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123026140 = 225192631231
BaseRepresentation
bin1110101010100…
…11101011011100
322120111101010201
413111103223130
5222443314030
620112513244
73022463536
oct725235334
9276441121
10123026140
11634993a6
123524b824
131c646443
14124a6856
15ac022ca
hex7553adc

123026140 has 48 divisors (see below), whose sum is σ = 273208320. Its totient is φ = 46405440.

The previous prime is 123026131. The next prime is 123026143. The reversal of 123026140 is 41620321.

It is a super-2 number, since 2×1230261402 = 30270862246599200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123026143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99325 + ... + 100555.

It is an arithmetic number, because the mean of its divisors is an integer number (5691840).

Almost surely, 2123026140 is an apocalyptic number.

123026140 is a gapful number since it is divisible by the number (10) 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 123026140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136604160).

123026140 is an abundant number, since it is smaller than the sum of its proper divisors (150182180).

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

123026140 is a wasteful number, since it uses less digits than its factorization.

123026140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 123026140 is about 11091.7149260157. The cubic root of 123026140 is about 497.3542109621.

Adding to 123026140 its reverse (41620321), we get a palindrome (164646461).

The spelling of 123026140 in words is "one hundred twenty-three million, twenty-six thousand, one hundred forty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 263 380 526 1052 1231 1315 2462 2630 4924 4997 5260 6155 9994 12310 19988 23389 24620 24985 46778 49970 93556 99940 116945 233890 323753 467780 647506 1295012 1618765 3237530 6151307 6475060 12302614 24605228 30756535 61513070 123026140