15147864 has 64 divisors (see below), whose sum is σ = 44304000. Its totient is φ = 4782240.

The previous prime is 15147859. The next prime is 15147893. The reversal of 15147864 is 46874151.

It is a happy number.

15147864 is digitally balanced in base 2 and base 4, because in such bases 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 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, 2259 + ... + 5949.

It is an arithmetic number, because the mean of its divisors is an integer number (692250).

Almost surely, 2^15147864 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 15147864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22152000).

15147864 is an abundant number, since it is smaller than the sum of its proper divisors (29156136).

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

15147864 is a wasteful number, since it uses less digits than its factorization.

15147864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3715 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 15147864 is about 3892.0256936459. The cubic root of 15147864 is about 247.4289235757.

The spelling of 15147864 in words is "fifteen million, one hundred forty-seven thousand, eight hundred sixty-four".