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1812260808 = 23322921732
BaseRepresentation
bin110110000000100…
…1110011111001000
311200022002101110200
41230001032133020
512202414321213
6455455012200
762623651131
oct15401163710
94608071420
101812260808
1184aa79406
12426b0a060
1322b5c3997
14132988c88
15a917b273
hex6c04e7c8

1812260808 has 108 divisors (see below), whose sum is σ = 5112844035. Its totient is φ = 579884928.

The previous prime is 1812260783. The next prime is 1812260861. The reversal of 1812260808 is 8080622181.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 1672973604 + 139287204 = 40902^2 + 11802^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=30102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10475410 + ... + 10475582.

Almost surely, 21812260808 is an apocalyptic number.

1812260808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812260808

1812260808 is an abundant number, since it is smaller than the sum of its proper divisors (3300583227).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1812260808 is a wasteful number, since it uses less digits than its factorization.

1812260808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1812260808 is about 42570.6566545549. The cubic root of 1812260808 is about 1219.1961039256.

Adding to 1812260808 its reverse (8080622181), we get a palindrome (9892882989).

The spelling of 1812260808 in words is "one billion, eight hundred twelve million, two hundred sixty thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 9 12 18 24 29 36 58 72 87 116 173 174 232 261 346 348 519 522 692 696 841 1038 1044 1384 1557 1682 2076 2088 2523 3114 3364 4152 5017 5046 6228 6728 7569 10034 10092 12456 15051 15138 20068 20184 29929 30102 30276 40136 45153 59858 60204 60552 89787 90306 119716 120408 145493 179574 180612 239432 269361 290986 359148 361224 436479 538722 581972 718296 867941 872958 1077444 1163944 1309437 1735882 1745916 2154888 2603823 2618874 3471764 3491832 5207646 5237748 6943528 7811469 10415292 10475496 15622938 20830584 25170289 31245876 50340578 62491752 75510867 100681156 151021734 201362312 226532601 302043468 453065202 604086936 906130404 1812260808