28630732 has 24 divisors (see below), whose sum is σ = 55701632. Its totient is φ = 12787200.

The previous prime is 28630717. The next prime is 28630757. The reversal of 28630732 is 23703682.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 28630694 and 28630703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7269 + ... + 10492.

Almost surely, 2^28630732 is an apocalyptic number.

It is an amenable number.

28630732 is a deficient number, since it is larger than the sum of its proper divisors (27070900).

28630732 is a wasteful number, since it uses less digits than its factorization.

28630732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17809 (or 17807 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 28630732 is about 5350.7692904852. The cubic root of 28630732 is about 305.9220756482.

The spelling of 28630732 in words is "twenty-eight million, six hundred thirty thousand, seven hundred thirty-two".