30923988 has 48 divisors (see below), whose sum is σ = 75339264. Its totient is φ = 9861120.

The previous prime is 30923987. The next prime is 30924017. The reversal of 30923988 is 88932903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30923987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35656 + ... + 36512.

It is an arithmetic number, because the mean of its divisors is an integer number (1569568).

Almost surely, 2^30923988 is an apocalyptic number.

It is an amenable number.

30923988 is an abundant number, since it is smaller than the sum of its proper divisors (44415276).

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

30923988 is a wasteful number, since it uses less digits than its factorization.

30923988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 30923988 is about 5560.9340941968. The cubic root of 30923988 is about 313.8810995860.

The spelling of 30923988 in words is "thirty million, nine hundred twenty-three thousand, nine hundred eighty-eight".