30923172 has 72 divisors (see below), whose sum is σ = 89858496. Its totient is φ = 8783424.

The previous prime is 30923159. The next prime is 30923173. The reversal of 30923172 is 27132903.

It is not an unprimeable number, because it can be changed into a prime (30923173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69583 + ... + 70025.

Almost surely, 2^30923172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30923172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44929248).

30923172 is an abundant number, since it is smaller than the sum of its proper divisors (58935324).

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

30923172 is a wasteful number, since it uses less digits than its factorization.

30923172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 30923172 is about 5560.8607247440. The cubic root of 30923172 is about 313.8783387386.

The spelling of 30923172 in words is "thirty million, nine hundred twenty-three thousand, one hundred seventy-two".