13957998 has 32 divisors (see below), whose sum is σ = 29140992. Its totient is φ = 4452000.

The previous prime is 13957981. The next prime is 13958011. The reversal of 13957998 is 89975931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13957998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18415 + ... + 19157.

It is an arithmetic number, because the mean of its divisors is an integer number (910656).

Almost surely, 2^13957998 is an apocalyptic number.

13957998 is an abundant number, since it is smaller than the sum of its proper divisors (15182994).

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

13957998 is a wasteful number, since it uses less digits than its factorization.

13957998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 612360, while the sum is 51.

The square root of 13957998 is about 3736.0404173403. The cubic root of 13957998 is about 240.7729592745.

The spelling of 13957998 in words is "thirteen million, nine hundred fifty-seven thousand, nine hundred ninety-eight".