72757788 has 12 divisors (see below), whose sum is σ = 169768200. Its totient is φ = 24252592.

The previous prime is 72757787. The next prime is 72757819. The reversal of 72757788 is 88775727.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 72757788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72757787) 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, 3031563 + ... + 3031586.

It is an arithmetic number, because the mean of its divisors is an integer number (14147350).

Almost surely, 2^72757788 is an apocalyptic number.

It is an amenable number.

72757788 is an abundant number, since it is smaller than the sum of its proper divisors (97010412).

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

72757788 is a wasteful number, since it uses less digits than its factorization.

72757788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6063156 (or 6063154 counting only the distinct ones).

The product of its digits is 1536640, while the sum is 51.

The square root of 72757788 is about 8529.8175830436. The cubic root of 72757788 is about 417.4711763719.

The spelling of 72757788 in words is "seventy-two million, seven hundred fifty-seven thousand, seven hundred eighty-eight".