72650556 has 36 divisors (see below), whose sum is σ = 200340504. Its totient is φ = 22015200.

The previous prime is 72650531. The next prime is 72650563. The reversal of 72650556 is 65505627.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 72650556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91335 + ... + 92126.

It is an arithmetic number, because the mean of its divisors is an integer number (5565014).

Almost surely, 2^72650556 is an apocalyptic number.

It is an amenable number.

72650556 is an abundant number, since it is smaller than the sum of its proper divisors (127689948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72650556 is a wasteful number, since it uses less digits than its factorization.

72650556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183482 (or 183477 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 72650556 is about 8523.5295506028. The cubic root of 72650556 is about 417.2659828527.

Subtracting from 72650556 its reverse (65505627), we obtain a square (7144929 = 2673²).

The spelling of 72650556 in words is "seventy-two million, six hundred fifty thousand, five hundred fifty-six".