72426344 has 8 divisors (see below), whose sum is σ = 135799410. Its totient is φ = 36213168.

The previous prime is 72426329. The next prime is 72426371. The reversal of 72426344 is 44362427.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 5808100 = 8162^2 + 2410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 72426344.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4526639 + ... + 4526654.

Almost surely, 2^72426344 is an apocalyptic number.

It is an amenable number.

72426344 is a deficient number, since it is larger than the sum of its proper divisors (63373066).

72426344 is a wasteful number, since it uses less digits than its factorization.

72426344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053299 (or 9053295 counting only the distinct ones).

The product of its digits is 32256, while the sum is 32.

The square root of 72426344 is about 8510.3668546074. The cubic root of 72426344 is about 416.8362891961.

The spelling of 72426344 in words is "seventy-two million, four hundred twenty-six thousand, three hundred forty-four".