15612872 has 36 divisors (see below), whose sum is σ = 32432715. Its totient is φ = 7040880.

The previous prime is 15612811. The next prime is 15612887. The reversal of 15612872 is 27821651.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 7806436 + 7806436 = 2794^2 + 2794^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2794.

It is a Duffinian number.

Its product of digits (6720) is a multiple of the sum of its prime divisors (140).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 122873 + ... + 122999.

Almost surely, 2^15612872 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 15612872

15612872 is an abundant number, since it is smaller than the sum of its proper divisors (16819843).

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

15612872 is a wasteful number, since it uses less digits than its factorization.

15612872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 140 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 15612872 is about 3951.3126932704. The cubic root of 15612872 is about 249.9353005907.

Multiplying 15612872 by its sum of digits (32), we get a square (499611904 = 22352²).

The spelling of 15612872 in words is "fifteen million, six hundred twelve thousand, eight hundred seventy-two".