30973992 has 32 divisors (see below), whose sum is σ = 88497600. Its totient is φ = 8849664.

The previous prime is 30973967. The next prime is 30973993. The reversal of 30973992 is 29937903.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (30973993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92017 + ... + 92352.

It is an arithmetic number, because the mean of its divisors is an integer number (2765550).

Almost surely, 2^30973992 is an apocalyptic number.

It is an amenable number.

30973992 is an abundant number, since it is smaller than the sum of its proper divisors (57523608).

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

30973992 is a wasteful number, since it uses less digits than its factorization.

30973992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184385 (or 184381 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 42.

The square root of 30973992 is about 5565.4282854063. The cubic root of 30973992 is about 314.0501900920.

The spelling of 30973992 in words is "thirty million, nine hundred seventy-three thousand, nine hundred ninety-two".