72309504 has 36 divisors (see below), whose sum is σ = 192450776. Its totient is φ = 24102912.

The previous prime is 72309473. The next prime is 72309509. The reversal of 72309504 is 40590327.

It is not an unprimeable number, because it can be changed into a prime (72309509) 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 in 3 ways as a sum of consecutive naturals, for example, 46309 + ... + 47844.

Almost surely, 2^72309504 is an apocalyptic number.

It is an amenable number.

72309504 is an abundant number, since it is smaller than the sum of its proper divisors (120141272).

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

72309504 is an equidigital number, since it uses as much as digits as its factorization.

72309504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94172 (or 94158 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 72309504 is about 8503.4995149056. The cubic root of 72309504 is about 416.6120182906.

The spelling of 72309504 in words is "seventy-two million, three hundred nine thousand, five hundred four".