72311690 has 64 divisors (see below), whose sum is σ = 148072320. Its totient is φ = 25194240.

The previous prime is 72311689. The next prime is 72311713. The reversal of 72311690 is 9611327.

It is a super-2 number, since 2×72311690² = 10457961021312200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 443549 + ... + 443711.

It is an arithmetic number, because the mean of its divisors is an integer number (2313630).

Almost surely, 2^72311690 is an apocalyptic number.

72311690 is an abundant number, since it is smaller than the sum of its proper divisors (75760630).

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

72311690 is a wasteful number, since it uses less digits than its factorization.

72311690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 72311690 is about 8503.6280492505. The cubic root of 72311690 is about 416.6162164695.

The spelling of 72311690 in words is "seventy-two million, three hundred eleven thousand, six hundred ninety".