72648256 has 14 divisors (see below), whose sum is σ = 144161510. Its totient is φ = 36324096.

The previous prime is 72648241. The next prime is 72648263. The reversal of 72648256 is 65284627.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 26625600 = 6784^2 + 5160^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567501 + ... + 567628.

Almost surely, 2^72648256 is an apocalyptic number.

It is an amenable number.

72648256 is a deficient number, since it is larger than the sum of its proper divisors (71513254).

72648256 is a wasteful number, since it uses less digits than its factorization.

72648256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135141 (or 1135131 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 72648256 is about 8523.3946289023. The cubic root of 72648256 is about 417.2615794825.

The spelling of 72648256 in words is "seventy-two million, six hundred forty-eight thousand, two hundred fifty-six".