72244664 has 8 divisors (see below), whose sum is σ = 135458760. Its totient is φ = 36122328.

The previous prime is 72244639. The next prime is 72244699. The reversal of 72244664 is 46644227.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4515284 + ... + 4515299.

It is an arithmetic number, because the mean of its divisors is an integer number (16932345).

Almost surely, 2^72244664 is an apocalyptic number.

It is an amenable number.

72244664 is a deficient number, since it is larger than the sum of its proper divisors (63214096).

72244664 is a wasteful number, since it uses less digits than its factorization.

72244664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030589 (or 9030585 counting only the distinct ones).

The product of its digits is 64512, while the sum is 35.

The square root of 72244664 is about 8499.6861118514. The cubic root of 72244664 is about 416.4874555890.

The spelling of 72244664 in words is "seventy-two million, two hundred forty-four thousand, six hundred sixty-four".