72648392 has 16 divisors (see below), whose sum is σ = 139538700. Its totient is φ = 35438080.

The previous prime is 72648379. The next prime is 72648397. The reversal of 72648392 is 29384627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 4519876 = 8254^2 + 2126^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (72648397) 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, 110417 + ... + 111072.

Almost surely, 2^72648392 is an apocalyptic number.

It is an amenable number.

72648392 is a deficient number, since it is larger than the sum of its proper divisors (66890308).

72648392 is a wasteful number, since it uses less digits than its factorization.

72648392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221536 (or 221532 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 72648392 is about 8523.4026069405. The cubic root of 72648392 is about 417.2618398583.

The spelling of 72648392 in words is "seventy-two million, six hundred forty-eight thousand, three hundred ninety-two".