15909942 has 16 divisors (see below), whose sum is σ = 31909680. Its totient is φ = 5288352.

The previous prime is 15909919. The next prime is 15909961. The reversal of 15909942 is 24990951.

15909942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15909942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317 + ... + 5792.

It is an arithmetic number, because the mean of its divisors is an integer number (1994355).

Almost surely, 2^15909942 is an apocalyptic number.

15909942 is an abundant number, since it is smaller than the sum of its proper divisors (15999738).

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

15909942 is a wasteful number, since it uses less digits than its factorization.

15909942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7487.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 15909942 is about 3988.7268645521. The cubic root of 15909942 is about 251.5105452960.

The spelling of 15909942 in words is "fifteen million, nine hundred nine thousand, nine hundred forty-two".