30397972 has 24 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 13004160.

The previous prime is 30397943. The next prime is 30397981. The reversal of 30397972 is 27979303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19572 + ... + 21067.

It is an arithmetic number, because the mean of its divisors is an integer number (2560320).

Almost surely, 2^30397972 is an apocalyptic number.

It is an amenable number.

30397972 is an abundant number, since it is smaller than the sum of its proper divisors (31049708).

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

30397972 is a wasteful number, since it uses less digits than its factorization.

30397972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40671 (or 40669 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 30397972 is about 5513.4355895394. The cubic root of 30397972 is about 312.0912099100.

It can be divided in two parts, 3039 and 7972, that added together give a palindrome (11011).

The spelling of 30397972 in words is "thirty million, three hundred ninety-seven thousand, nine hundred seventy-two".