15128856 has 80 divisors (see below), whose sum is σ = 43589040. Its totient is φ = 4898880.

The previous prime is 15128809. The next prime is 15128857. The reversal of 15128856 is 65882151.

15128856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15128856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15128857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23661 + ... + 24291.

It is an arithmetic number, because the mean of its divisors is an integer number (544863).

Almost surely, 2^15128856 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 15128856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21794520).

15128856 is an abundant number, since it is smaller than the sum of its proper divisors (28460184).

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

15128856 is a wasteful number, since it uses less digits than its factorization.

15128856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686 (or 673 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 15128856 is about 3889.5830110694. The cubic root of 15128856 is about 247.3253864794.

The spelling of 15128856 in words is "fifteen million, one hundred twenty-eight thousand, eight hundred fifty-six".