72637828 has 12 divisors (see below), whose sum is σ = 128907072. Its totient is φ = 35807240.

The previous prime is 72637823. The next prime is 72637843. The reversal of 72637828 is 82873627.

It is not an unprimeable number, because it can be changed into a prime (72637823) 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, 127600 + ... + 128167.

It is an arithmetic number, because the mean of its divisors is an integer number (10742256).

Almost surely, 2^72637828 is an apocalyptic number.

It is an amenable number.

72637828 is a deficient number, since it is larger than the sum of its proper divisors (56269244).

72637828 is a wasteful number, since it uses less digits than its factorization.

72637828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255842 (or 255840 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 72637828 is about 8522.7828788489. The cubic root of 72637828 is about 417.2416138187.

The spelling of 72637828 in words is "seventy-two million, six hundred thirty-seven thousand, eight hundred twenty-eight".