72978837 has 16 divisors (see below), whose sum is σ = 100520640. Its totient is φ = 47060352.

The previous prime is 72978817. The next prime is 72978881. The reversal of 72978837 is 73887927.

It is not a de Polignac number, because 72978837 - 2¹⁶ = 72913301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72978837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72978817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18033 + ... + 21705.

It is an arithmetic number, because the mean of its divisors is an integer number (6282540).

Almost surely, 2^72978837 is an apocalyptic number.

It is an amenable number.

72978837 is a deficient number, since it is larger than the sum of its proper divisors (27541803).

72978837 is a wasteful number, since it uses less digits than its factorization.

72978837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892.

The product of its digits is 1185408, while the sum is 51.

The square root of 72978837 is about 8542.7651846460. The cubic root of 72978837 is about 417.8935288144.

The spelling of 72978837 in words is "seventy-two million, nine hundred seventy-eight thousand, eight hundred thirty-seven".