128726056 has 16 divisors (see below), whose sum is σ = 241730100. Its totient is φ = 64264704.

The previous prime is 128726033. The next prime is 128726063. The reversal of 128726056 is 650627821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112996900 + 15729156 = 10630^2 + 3966^2 .

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, 6571 + ... + 17338.

Almost surely, 2^128726056 is an apocalyptic number.

It is an amenable number.

128726056 is a deficient number, since it is larger than the sum of its proper divisors (113004044).

128726056 is a wasteful number, since it uses less digits than its factorization.

128726056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24588 (or 24584 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 128726056 is about 11345.7505701474. The cubic root of 128726056 is about 504.9195127093.

The spelling of 128726056 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, fifty-six".