72397824 has 44 divisors (see below), whose sum is σ = 192974784. Its totient is φ = 24131584.

The previous prime is 72397811. The next prime is 72397861. The reversal of 72397824 is 42879327.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8712 + ... + 14855.

Almost surely, 2^72397824 is an apocalyptic number.

It is an amenable number.

72397824 is an abundant number, since it is smaller than the sum of its proper divisors (120576960).

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

72397824 is a wasteful number, since it uses less digits than its factorization.

72397824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23590 (or 23572 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 72397824 is about 8508.6910861777. The cubic root of 72397824 is about 416.7815681692.

The spelling of 72397824 in words is "seventy-two million, three hundred ninety-seven thousand, eight hundred twenty-four".