72789556 has 12 divisors (see below), whose sum is σ = 145579168. Its totient is φ = 31195512.

The previous prime is 72789547. The next prime is 72789557. The reversal of 72789556 is 65598727.

72789556 is an admirable number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72789557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299786 + ... + 1299841.

Almost surely, 2^72789556 is an apocalyptic number.

It is an amenable number.

72789556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72789556 is a wasteful number, since it uses less digits than its factorization.

72789556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599638 (or 2599636 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 49.

The square root of 72789556 is about 8531.6795532884. The cubic root of 72789556 is about 417.5319272320.

The spelling of 72789556 in words is "seventy-two million, seven hundred eighty-nine thousand, five hundred fifty-six".