128104756 has 36 divisors (see below), whose sum is σ = 252435652. Its totient is φ = 56542464.

The previous prime is 128104723. The next prime is 128104771. The reversal of 128104756 is 657401821.

It can be written as a sum of positive squares in 2 ways, for example, as 17139600 + 110965156 = 4140^2 + 10534^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25180 + ... + 29836.

Almost surely, 2^128104756 is an apocalyptic number.

It is an amenable number.

128104756 is a deficient number, since it is larger than the sum of its proper divisors (124330896).

128104756 is a wasteful number, since it uses less digits than its factorization.

128104756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720 (or 4695 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 128104756 is about 11318.3371570209. The cubic root of 128104756 is about 504.1058661041.

The spelling of 128104756 in words is "one hundred twenty-eight million, one hundred four thousand, seven hundred fifty-six".