72908506 has 16 divisors (see below), whose sum is σ = 119462688. Its totient is φ = 33096400.

The previous prime is 72908503. The next prime is 72908513. The reversal of 72908506 is 60580927.

It is not an unprimeable number, because it can be changed into a prime (72908503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19656 + ... + 23068.

It is an arithmetic number, because the mean of its divisors is an integer number (7466418).

Almost surely, 2^72908506 is an apocalyptic number.

72908506 is a deficient number, since it is larger than the sum of its proper divisors (46554182).

72908506 is a wasteful number, since it uses less digits than its factorization.

72908506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 72908506 is about 8538.6477852175. The cubic root of 72908506 is about 417.7592418643.

The spelling of 72908506 in words is "seventy-two million, nine hundred eight thousand, five hundred six".