72864737 has 8 divisors (see below), whose sum is σ = 84164832. Its totient is φ = 62344000.

The previous prime is 72864719. The next prime is 72864761. The reversal of 72864737 is 73746827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72864737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72864767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194639 + ... + 195012.

It is an arithmetic number, because the mean of its divisors is an integer number (10520604).

Almost surely, 2^72864737 is an apocalyptic number.

It is an amenable number.

72864737 is a deficient number, since it is larger than the sum of its proper divisors (11300095).

72864737 is a wasteful number, since it uses less digits than its factorization.

72864737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389679.

The product of its digits is 395136, while the sum is 44.

The square root of 72864737 is about 8536.0844067992. The cubic root of 72864737 is about 417.6756276403.

The spelling of 72864737 in words is "seventy-two million, eight hundred sixty-four thousand, seven hundred thirty-seven".