72340724 has 12 divisors (see below), whose sum is σ = 127593984. Its totient is φ = 35885304.

The previous prime is 72340691. The next prime is 72340781. The reversal of 72340724 is 42704327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70694 + ... + 71709.

It is an arithmetic number, because the mean of its divisors is an integer number (10632832).

Almost surely, 2^72340724 is an apocalyptic number.

It is an amenable number.

72340724 is a deficient number, since it is larger than the sum of its proper divisors (55253260).

72340724 is a wasteful number, since it uses less digits than its factorization.

72340724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142534 (or 142532 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 72340724 is about 8505.3350316140. The cubic root of 72340724 is about 416.6719677903.

The spelling of 72340724 in words is "seventy-two million, three hundred forty thousand, seven hundred twenty-four".