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26018980 = 225131923229
BaseRepresentation
bin110001101000…
…0010010100100
31210221220022221
41203100102210
523130101410
62325402124
7434105041
oct143202244
953856287
1026018980
1113761499
128869344
13550cc60
1436541c8
15243e4da
hex18d04a4

26018980 has 96 divisors (see below), whose sum is σ = 64915200. Its totient is φ = 8667648.

The previous prime is 26018977. The next prime is 26019011. The reversal of 26018980 is 8981062.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113506 + ... + 113734.

It is an arithmetic number, because the mean of its divisors is an integer number (676200).

Almost surely, 226018980 is an apocalyptic number.

26018980 is a gapful number since it is divisible by the number (20) 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 26018980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32457600).

26018980 is an abundant number, since it is smaller than the sum of its proper divisors (38896220).

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

26018980 is a wasteful number, since it uses less digits than its factorization.

26018980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 26018980 is about 5100.8803161807. The cubic root of 26018980 is about 296.3216767109.

The spelling of 26018980 in words is "twenty-six million, eighteen thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 13 19 20 23 26 38 46 52 65 76 92 95 115 130 190 229 230 247 260 299 380 437 458 460 494 598 874 916 988 1145 1196 1235 1495 1748 2185 2290 2470 2977 2990 4351 4370 4580 4940 5267 5681 5954 5980 8702 8740 10534 11362 11908 14885 17404 21068 21755 22724 26335 28405 29770 43510 52670 56563 56810 59540 68471 87020 100073 105340 113126 113620 136942 200146 226252 273884 282815 342355 400292 500365 565630 684710 1000730 1131260 1300949 1369420 2001460 2601898 5203796 6504745 13009490 26018980