72915290 has 32 divisors (see below), whose sum is σ = 156522240. Its totient is φ = 23912064.

The previous prime is 72915289. The next prime is 72915299. The reversal of 72915290 is 9251927.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 72915290.

It is not an unprimeable number, because it can be changed into a prime (72915299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21035 + ... + 24254.

It is an arithmetic number, because the mean of its divisors is an integer number (4891320).

Almost surely, 2^72915290 is an apocalyptic number.

72915290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72915290 is an abundant number, since it is smaller than the sum of its proper divisors (83606950).

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

72915290 is a wasteful number, since it uses less digits than its factorization.

72915290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45326.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 72915290 is about 8539.0450285732. The cubic root of 72915290 is about 417.7721987009.

The spelling of 72915290 in words is "seventy-two million, nine hundred fifteen thousand, two hundred ninety".