8449970728 has 16 divisors (see below), whose sum is σ = 15872148180. Its totient is φ = 4217397888.

The previous prime is 8449970663. The next prime is 8449970747. The reversal of 8449970728 is 8270799448.

It can be written as a sum of positive squares in 2 ways, for example, as 7154114724 + 1295856004 = 84582^2 + 35998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943701 + ... + 952612.

Almost surely, 2^8449970728 is an apocalyptic number.

It is an amenable number.

8449970728 is a deficient number, since it is larger than the sum of its proper divisors (7422177452).

8449970728 is a wasteful number, since it uses less digits than its factorization.

8449970728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896876 (or 1896872 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 58.

The square root of 8449970728 is about 91923.7223354233. The cubic root of 8449970728 is about 2036.8157043032.

The spelling of 8449970728 in words is "eight billion, four hundred forty-nine million, nine hundred seventy thousand, seven hundred twenty-eight".