72971764 has 12 divisors (see below), whose sum is σ = 127960000. Its totient is φ = 36411768.

The previous prime is 72971699. The next prime is 72971771. The reversal of 72971764 is 46717927.

It is a self number, because there is not a number n which added to its sum of digits gives 72971764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16284 + ... + 20275.

Almost surely, 2^72971764 is an apocalyptic number.

It is an amenable number.

72971764 is a deficient number, since it is larger than the sum of its proper divisors (54988236).

72971764 is a wasteful number, since it uses less digits than its factorization.

72971764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37062 (or 37060 counting only the distinct ones).

The product of its digits is 148176, while the sum is 43.

The square root of 72971764 is about 8542.3511985870. The cubic root of 72971764 is about 417.8800278392.

The spelling of 72971764 in words is "seventy-two million, nine hundred seventy-one thousand, seven hundred sixty-four".