72656990 has 16 divisors (see below), whose sum is σ = 149465952. Its totient is φ = 24910944.

The previous prime is 72656989. The next prime is 72656993. The reversal of 72656990 is 9965627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72656993) 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, 518909 + ... + 519048.

It is an arithmetic number, because the mean of its divisors is an integer number (9341622).

Almost surely, 2^72656990 is an apocalyptic number.

72656990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72656990 is an abundant number, since it is smaller than the sum of its proper divisors (76808962).

72656990 is a wasteful number, since it uses less digits than its factorization.

72656990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037971.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 72656990 is about 8523.9069680517. The cubic root of 72656990 is about 417.2783003088.

The spelling of 72656990 in words is "seventy-two million, six hundred fifty-six thousand, nine hundred ninety".