72171076 has 12 divisors (see below), whose sum is σ = 126359100. Its totient is φ = 36068480.

The previous prime is 72171061. The next prime is 72171083. The reversal of 72171076 is 67017127.

It can be written as a sum of positive squares in 2 ways, for example, as 61214976 + 10956100 = 7824^2 + 3310^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (10529925).

Almost surely, 2^72171076 is an apocalyptic number.

It is an amenable number.

72171076 is a deficient number, since it is larger than the sum of its proper divisors (54188024).

72171076 is a wasteful number, since it uses less digits than its factorization.

72171076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8534 (or 8532 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 72171076 is about 8495.3561432114. The cubic root of 72171076 is about 416.3459969714.

The spelling of 72171076 in words is "seventy-two million, one hundred seventy-one thousand, seventy-six".