15920856 has 96 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 4397760.

The previous prime is 15920843. The next prime is 15920873. The reversal of 15920856 is 65802951.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15920856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15115 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (530400).

Almost surely, 2^15920856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15920856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25459200).

15920856 is an abundant number, since it is smaller than the sum of its proper divisors (34997544).

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

15920856 is a wasteful number, since it uses less digits than its factorization.

15920856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 15920856 is about 3990.0947357174. The cubic root of 15920856 is about 251.5680430681.

The spelling of 15920856 in words is "fifteen million, nine hundred twenty thousand, eight hundred fifty-six".