72420504328 has 32 divisors (see below), whose sum is σ = 136565164800. Its totient is φ = 36003678912.

The previous prime is 72420504323. The next prime is 72420504337. The reversal of 72420504328 is 82340502427.

It is not an unprimeable number, because it can be changed into a prime (72420504323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027351 + ... + 1095577.

It is an arithmetic number, because the mean of its divisors is an integer number (4267661400).

Almost surely, 2^72420504328 is an apocalyptic number.

It is an amenable number.

72420504328 is a deficient number, since it is larger than the sum of its proper divisors (64144660472).

72420504328 is a wasteful number, since it uses less digits than its factorization.

72420504328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68989 (or 68985 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 72420504328 in words is "seventy-two billion, four hundred twenty million, five hundred four thousand, three hundred twenty-eight".