72305224 has 16 divisors (see below), whose sum is σ = 137289600. Its totient is φ = 35694672.

The previous prime is 72305221. The next prime is 72305249. The reversal of 72305224 is 42250327.

It is not an unprimeable number, because it can be changed into a prime (72305221) 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, 56572 + ... + 57835.

It is an arithmetic number, because the mean of its divisors is an integer number (8580600).

Almost surely, 2^72305224 is an apocalyptic number.

It is an amenable number.

72305224 is a deficient number, since it is larger than the sum of its proper divisors (64984376).

72305224 is a wasteful number, since it uses less digits than its factorization.

72305224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114492 (or 114488 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72305224 is about 8503.2478500865. The cubic root of 72305224 is about 416.6037983724.

The spelling of 72305224 in words is "seventy-two million, three hundred five thousand, two hundred twenty-four".