72656385 has 16 divisors (see below), whose sum is σ = 123088896. Its totient is φ = 36470528.

The previous prime is 72656371. The next prime is 72656393. The reversal of 72656385 is 58365627.

It is a cyclic number.

It is not a de Polignac number, because 72656385 - 2⁷ = 72656257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142209 + ... + 142718.

It is an arithmetic number, because the mean of its divisors is an integer number (7693056).

Almost surely, 2^72656385 is an apocalyptic number.

It is an amenable number.

72656385 is a deficient number, since it is larger than the sum of its proper divisors (50432511).

72656385 is a wasteful number, since it uses less digits than its factorization.

72656385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284952.

The product of its digits is 302400, while the sum is 42.

The square root of 72656385 is about 8523.8714795567. The cubic root of 72656385 is about 417.2771421083.

The spelling of 72656385 in words is "seventy-two million, six hundred fifty-six thousand, three hundred eighty-five".