72531290 has 32 divisors (see below), whose sum is σ = 140990976. Its totient is φ = 26706240.

The previous prime is 72531287. The next prime is 72531301. The reversal of 72531290 is 9213527.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72695 + ... + 73685.

It is an arithmetic number, because the mean of its divisors is an integer number (4405968).

Almost surely, 2^72531290 is an apocalyptic number.

72531290 is a deficient number, since it is larger than the sum of its proper divisors (68459686).

72531290 is a wasteful number, since it uses less digits than its factorization.

72531290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 72531290 is about 8516.5303968224. The cubic root of 72531290 is about 417.0375243948.

The spelling of 72531290 in words is "seventy-two million, five hundred thirty-one thousand, two hundred ninety".