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13237972 = 221123103127
BaseRepresentation
bin110010011111…
…111011010100
3220220120002021
4302133323110
511342103342
61151422524
7220343446
oct62377324
926816067
1013237972
117521980
124524a44
132986627
141a88496
151267567
hexc9fed4

13237972 has 48 divisors (see below), whose sum is σ = 26836992. Its totient is φ = 5654880.

The previous prime is 13237967. The next prime is 13237979. The reversal of 13237972 is 27973231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13237979) 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, 104173 + ... + 104299.

It is an arithmetic number, because the mean of its divisors is an integer number (559104).

Almost surely, 213237972 is an apocalyptic number.

It is an amenable number.

13237972 is an abundant number, since it is smaller than the sum of its proper divisors (13599020).

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

13237972 is a wasteful number, since it uses less digits than its factorization.

13237972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 266 counting only the distinct ones).

The product of its digits is 15876, while the sum is 34.

The square root of 13237972 is about 3638.4023966571. The cubic root of 13237972 is about 236.5595503711.

The spelling of 13237972 in words is "thirteen million, two hundred thirty-seven thousand, nine hundred seventy-two".

Divisors: 1 2 4 11 22 23 44 46 92 103 127 206 253 254 412 506 508 1012 1133 1397 2266 2369 2794 2921 4532 4738 5588 5842 9476 11684 13081 26059 26162 32131 52118 52324 64262 104236 128524 143891 287782 300863 575564 601726 1203452 3309493 6618986 13237972