72992280 has 32 divisors (see below), whose sum is σ = 218977200. Its totient is φ = 19464576.

The previous prime is 72992267. The next prime is 72992299. The reversal of 72992280 is 8229927.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304015 + ... + 304254.

Almost surely, 2^72992280 is an apocalyptic number.

It is an amenable number.

72992280 is an abundant number, since it is smaller than the sum of its proper divisors (145984920).

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

72992280 is a wasteful number, since it uses less digits than its factorization.

72992280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608283 (or 608279 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 72992280 is about 8543.5519545444. The cubic root of 72992280 is about 417.9191864710.

The spelling of 72992280 in words is "seventy-two million, nine hundred ninety-two thousand, two hundred eighty".