30530928 has 20 divisors (see below), whose sum is σ = 78871688. Its totient is φ = 10176960.

The previous prime is 30530921. The next prime is 30530971. The reversal of 30530928 is 82903503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30530895 and 30530904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30530921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317983 + ... + 318078.

Almost surely, 2^30530928 is an apocalyptic number.

It is an amenable number.

30530928 is an abundant number, since it is smaller than the sum of its proper divisors (48340760).

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

30530928 is a wasteful number, since it uses less digits than its factorization.

30530928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636072 (or 636066 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 30530928 is about 5525.4798886613. The cubic root of 30530928 is about 312.5455609305.

The spelling of 30530928 in words is "thirty million, five hundred thirty thousand, nine hundred twenty-eight".