72172376 has 8 divisors (see below), whose sum is σ = 135323220. Its totient is φ = 36086184.

The previous prime is 72172363. The next prime is 72172391. The reversal of 72172376 is 67327127.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4510766 + ... + 4510781.

Almost surely, 2^72172376 is an apocalyptic number.

It is an amenable number.

72172376 is a deficient number, since it is larger than the sum of its proper divisors (63150844).

72172376 is a wasteful number, since it uses less digits than its factorization.

72172376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9021553 (or 9021549 counting only the distinct ones).

The product of its digits is 24696, while the sum is 35.

The square root of 72172376 is about 8495.4326552566. The cubic root of 72172376 is about 416.3484968027.

The spelling of 72172376 in words is "seventy-two million, one hundred seventy-two thousand, three hundred seventy-six".