72304728 has 32 divisors (see below), whose sum is σ = 190276800. Its totient is φ = 22832928.

The previous prime is 72304717. The next prime is 72304733. The reversal of 72304728 is 82740327.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 78826 + ... + 79737.

It is an arithmetic number, because the mean of its divisors is an integer number (5946150).

Almost surely, 2^72304728 is an apocalyptic number.

It is an amenable number.

72304728 is an abundant number, since it is smaller than the sum of its proper divisors (117972072).

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

72304728 is a wasteful number, since it uses less digits than its factorization.

72304728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158591 (or 158587 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 72304728 is about 8503.2186847099. The cubic root of 72304728 is about 416.6028457628.

The spelling of 72304728 in words is "seventy-two million, three hundred four thousand, seven hundred twenty-eight".