307972392 has 128 divisors (see below), whose sum is σ = 988968960. Its totient is φ = 77679360.

The previous prime is 307972367. The next prime is 307972393. The reversal of 307972392 is 293279703.

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 (307972393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47167 + ... + 53297.

It is an arithmetic number, because the mean of its divisors is an integer number (7726320).

Almost surely, 2^307972392 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 307972392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494484480).

307972392 is an abundant number, since it is smaller than the sum of its proper divisors (680996568).

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

307972392 is a wasteful number, since it uses less digits than its factorization.

307972392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6183 (or 6179 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 307972392 is about 17549.1422012587. The cubic root of 307972392 is about 675.3111629845.

The spelling of 307972392 in words is "three hundred seven million, nine hundred seventy-two thousand, three hundred ninety-two".