30528972 has 36 divisors (see below), whose sum is σ = 81233880. Its totient is φ = 9640512.

The previous prime is 30528961. The next prime is 30528973. The reversal of 30528972 is 27982503.

It is a happy number.

30528972 is a `hidden beast` number, since 305 + 289 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (30528973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21633 + ... + 23000.

Almost surely, 2^30528972 is an apocalyptic number.

It is an amenable number.

30528972 is an abundant number, since it is smaller than the sum of its proper divisors (50704908).

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

30528972 is a wasteful number, since it uses less digits than its factorization.

30528972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44662 (or 44657 counting only the distinct ones).

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

The square root of 30528972 is about 5525.3028876253. The cubic root of 30528972 is about 312.5388862543.

The spelling of 30528972 in words is "thirty million, five hundred twenty-eight thousand, nine hundred seventy-two".