30728632 has 32 divisors (see below), whose sum is σ = 65026800. Its totient is φ = 13484800.

The previous prime is 30728629. The next prime is 30728641. The reversal of 30728632 is 23682703.

It is a junction number, because it is equal to n+sod(n) for n = 30728594 and 30728603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3469 + ... + 8572.

Almost surely, 2^30728632 is an apocalyptic number.

It is an amenable number.

30728632 is an abundant number, since it is smaller than the sum of its proper divisors (34298168).

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

30728632 is a wasteful number, since it uses less digits than its factorization.

30728632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12087 (or 12083 counting only the distinct ones).

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

The square root of 30728632 is about 5543.3412307019. The cubic root of 30728632 is about 313.2187428671.

The spelling of 30728632 in words is "thirty million, seven hundred twenty-eight thousand, six hundred thirty-two".