72650128 has 10 divisors (see below), whose sum is σ = 140759654. Its totient is φ = 36325056.

The previous prime is 72650107. The next prime is 72650147. The reversal of 72650128 is 82105627.

It can be written as a sum of positive squares in only one way, i.e., 71368704 + 1281424 = 8448^2 + 1132^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72650128.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270301 + ... + 2270332.

Almost surely, 2^72650128 is an apocalyptic number.

It is an amenable number.

72650128 is a deficient number, since it is larger than the sum of its proper divisors (68109526).

72650128 is a wasteful number, since it uses less digits than its factorization.

72650128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540641 (or 4540635 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 72650128 is about 8523.5044435960. The cubic root of 72650128 is about 417.2651634500.

The spelling of 72650128 in words is "seventy-two million, six hundred fifty thousand, one hundred twenty-eight".