72811772 has 24 divisors (see below), whose sum is σ = 140770560. Its totient is φ = 32675760.

The previous prime is 72811763. The next prime is 72811807. The reversal of 72811772 is 27711827.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6998 + ... + 13949.

It is an arithmetic number, because the mean of its divisors is an integer number (5865440).

Almost surely, 2^72811772 is an apocalyptic number.

It is an amenable number.

72811772 is a deficient number, since it is larger than the sum of its proper divisors (67958788).

72811772 is a wasteful number, since it uses less digits than its factorization.

72811772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21041 (or 21039 counting only the distinct ones).

The product of its digits is 10976, while the sum is 35.

The square root of 72811772 is about 8532.9814250354. The cubic root of 72811772 is about 417.5744010257.

The spelling of 72811772 in words is "seventy-two million, eight hundred eleven thousand, seven hundred seventy-two".