72407344 has 20 divisors (see below), whose sum is σ = 141000400. Its totient is φ = 36020160.

The previous prime is 72407341. The next prime is 72407389. The reversal of 72407344 is 44370427.

It is not an unprimeable number, because it can be changed into a prime (72407341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8187 + ... + 14554.

It is an arithmetic number, because the mean of its divisors is an integer number (7050020).

Almost surely, 2^72407344 is an apocalyptic number.

It is an amenable number.

72407344 is a deficient number, since it is larger than the sum of its proper divisors (68593056).

72407344 is a wasteful number, since it uses less digits than its factorization.

72407344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22948 (or 22942 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 72407344 is about 8509.2504957840. The cubic root of 72407344 is about 416.7998356917.

The spelling of 72407344 in words is "seventy-two million, four hundred seven thousand, three hundred forty-four".