72790530 has 16 divisors (see below), whose sum is σ = 174697344. Its totient is φ = 19410800.

The previous prime is 72790513. The next prime is 72790559. The reversal of 72790530 is 3509727.

It is a super-2 number, since 2×72790530² = 10596922515361800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 72790491 and 72790500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213146 + ... + 1213205.

It is an arithmetic number, because the mean of its divisors is an integer number (10918584).

Almost surely, 2^72790530 is an apocalyptic number.

72790530 is an abundant number, since it is smaller than the sum of its proper divisors (101906814).

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

72790530 is a wasteful number, since it uses less digits than its factorization.

72790530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426361.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 72790530 is about 8531.7366344725. The cubic root of 72790530 is about 417.5337895609.

The spelling of 72790530 in words is "seventy-two million, seven hundred ninety thousand, five hundred thirty".