72657448 has 16 divisors (see below), whose sum is σ = 136368180. Its totient is φ = 36292608.

The previous prime is 72657421. The next prime is 72657449. The reversal of 72657448 is 84475627.

It can be written as a sum of positive squares in 2 ways, for example, as 72556324 + 101124 = 8518^2 + 318^2 .

It is not an unprimeable number, because it can be changed into a prime (72657449) 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, 5286 + ... + 13162.

Almost surely, 2^72657448 is an apocalyptic number.

It is an amenable number.

72657448 is a deficient number, since it is larger than the sum of its proper divisors (63710732).

72657448 is a wasteful number, since it uses less digits than its factorization.

72657448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036 (or 9032 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 72657448 is about 8523.9338336240. The cubic root of 72657448 is about 417.2791770909.

The spelling of 72657448 in words is "seventy-two million, six hundred fifty-seven thousand, four hundred forty-eight".