72606644 has 24 divisors (see below), whose sum is σ = 139893600. Its totient is φ = 32698080.

The previous prime is 72606637. The next prime is 72606697. The reversal of 72606644 is 44660627.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2774 + ... + 12365.

It is an arithmetic number, because the mean of its divisors is an integer number (5828900).

Almost surely, 2^72606644 is an apocalyptic number.

It is an amenable number.

72606644 is a deficient number, since it is larger than the sum of its proper divisors (67286956).

72606644 is a wasteful number, since it uses less digits than its factorization.

72606644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15263 (or 15261 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 72606644 is about 8520.9532330603. The cubic root of 72606644 is about 417.1818968859.

The spelling of 72606644 in words is "seventy-two million, six hundred six thousand, six hundred forty-four".