72371776 has 14 divisors (see below), whose sum is σ = 143612870. Its totient is φ = 36185856.

The previous prime is 72371753. The next prime is 72371851. The reversal of 72371776 is 67717327.

It can be written as a sum of positive squares in only one way, i.e., 49561600 + 22810176 = 7040^2 + 4776^2 .

It is a super-2 number, since 2×72371776² = 10475347922788352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565341 + ... + 565468.

Almost surely, 2^72371776 is an apocalyptic number.

It is an amenable number.

72371776 is a deficient number, since it is larger than the sum of its proper divisors (71241094).

72371776 is a wasteful number, since it uses less digits than its factorization.

72371776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130821 (or 1130811 counting only the distinct ones).

The product of its digits is 86436, while the sum is 40.

The square root of 72371776 is about 8507.1602782597. The cubic root of 72371776 is about 416.7315775850.

The spelling of 72371776 in words is "seventy-two million, three hundred seventy-one thousand, seven hundred seventy-six".