30572928 has 48 divisors (see below), whose sum is σ = 87980100. Its totient is φ = 10190592.

The previous prime is 30572909. The next prime is 30572929. The reversal of 30572928 is 82927503.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30572892 and 30572901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30572929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12118 + ... + 14421.

Almost surely, 2^30572928 is an apocalyptic number.

It is an amenable number.

30572928 is an abundant number, since it is smaller than the sum of its proper divisors (57407172).

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

30572928 is a wasteful number, since it uses less digits than its factorization.

30572928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26559 (or 26544 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 30572928 is about 5529.2791573586. The cubic root of 30572928 is about 312.6888134687.

The spelling of 30572928 in words is "thirty million, five hundred seventy-two thousand, nine hundred twenty-eight".