72304056 has 64 divisors (see below), whose sum is σ = 219110400. Its totient is φ = 21909600.

The previous prime is 72303991. The next prime is 72304061. The reversal of 72304056 is 65040327.

It is a happy number.

It is a super-2 number, since 2×72304056² = 10455753028102272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 15 ways as a sum of consecutive naturals, for example, 12840 + ... + 17591.

It is an arithmetic number, because the mean of its divisors is an integer number (3423600).

Almost surely, 2^72304056 is an apocalyptic number.

It is an amenable number.

72304056 is an abundant number, since it is smaller than the sum of its proper divisors (146806344).

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

72304056 is a wasteful number, since it uses less digits than its factorization.

72304056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30457 (or 30447 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 72304056 is about 8503.1791701692. The cubic root of 72304056 is about 416.6015551235.

The spelling of 72304056 in words is "seventy-two million, three hundred four thousand, fifty-six".