15630728 has 16 divisors (see below), whose sum is σ = 29376000. Its totient is φ = 7797136.

The previous prime is 15630697. The next prime is 15630737. The reversal of 15630728 is 82703651.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15630694 and 15630703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1793 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1836000).

Almost surely, 2^15630728 is an apocalyptic number.

It is an amenable number.

15630728 is a deficient number, since it is larger than the sum of its proper divisors (13745272).

15630728 is a wasteful number, since it uses less digits than its factorization.

15630728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564 (or 4560 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 15630728 is about 3953.5715498774. The cubic root of 15630728 is about 250.0305456010.

The spelling of 15630728 in words is "fifteen million, six hundred thirty thousand, seven hundred twenty-eight".