72313290 has 64 divisors (see below), whose sum is σ = 220389120. Its totient is φ = 16528320.

The previous prime is 72313277. The next prime is 72313321. The reversal of 72313290 is 9231327.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17241 + ... + 21020.

It is an arithmetic number, because the mean of its divisors is an integer number (3443580).

Almost surely, 2^72313290 is an apocalyptic number.

72313290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72313290 is an abundant number, since it is smaller than the sum of its proper divisors (148075830).

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

72313290 is a wasteful number, since it uses less digits than its factorization.

72313290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38284 (or 38278 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 72313290 is about 8503.7221262221. The cubic root of 72313290 is about 416.6192891909.

The spelling of 72313290 in words is "seventy-two million, three hundred thirteen thousand, two hundred ninety".