13929872 has 20 divisors (see below), whose sum is σ = 29443056. Its totient is φ = 6331680.

The previous prime is 13929863. The next prime is 13929887. The reversal of 13929872 is 27892931.

It is a happy number.

It is a super-3 number, since 3×13929872³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39398 + ... + 39749.

Almost surely, 2^13929872 is an apocalyptic number.

It is an amenable number.

13929872 is an abundant number, since it is smaller than the sum of its proper divisors (15513184).

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

13929872 is a wasteful number, since it uses less digits than its factorization.

13929872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79166 (or 79160 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 13929872 is about 3732.2743736226. The cubic root of 13929872 is about 240.6111277098.

The spelling of 13929872 in words is "thirteen million, nine hundred twenty-nine thousand, eight hundred seventy-two".