72326656 has 20 divisors (see below), whose sum is σ = 144513072. Its totient is φ = 36163072.

The previous prime is 72326647. The next prime is 72326659. The reversal of 72326656 is 65662327.

It is a super-2 number, since 2×72326656² = 10462290336284672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72326659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70120 + ... + 71143.

Almost surely, 2^72326656 is an apocalyptic number.

It is an amenable number.

72326656 is a deficient number, since it is larger than the sum of its proper divisors (72186416).

72326656 is an equidigital number, since it uses as much as digits as its factorization.

72326656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141281 (or 141265 counting only the distinct ones).

The product of its digits is 90720, while the sum is 37.

The square root of 72326656 is about 8504.5079810651. The cubic root of 72326656 is about 416.6449561666.

The spelling of 72326656 in words is "seventy-two million, three hundred twenty-six thousand, six hundred fifty-six".