72156764 has 12 divisors (see below), whose sum is σ = 128415000. Its totient is φ = 35466768.

The previous prime is 72156739. The next prime is 72156767. The reversal of 72156764 is 46765127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72156767) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 152639 + ... + 153110.

It is an arithmetic number, because the mean of its divisors is an integer number (10701250).

Almost surely, 2^72156764 is an apocalyptic number.

It is an amenable number.

72156764 is a deficient number, since it is larger than the sum of its proper divisors (56258236).

72156764 is a wasteful number, since it uses less digits than its factorization.

72156764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305812 (or 305810 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 72156764 is about 8494.5137588917. The cubic root of 72156764 is about 416.3184737669.

It can be divided in two parts, 7215 and 6764, that multiplied together give a triangular number (48802260 = T₉₈₇₉).

The spelling of 72156764 in words is "seventy-two million, one hundred fifty-six thousand, seven hundred sixty-four".