128627785 has 16 divisors (see below), whose sum is σ = 181339200. Its totient is φ = 86351040.

The previous prime is 128627771. The next prime is 128627791. The reversal of 128627785 is 587726821.

It is not a de Polignac number, because 128627785 - 2⁷ = 128627657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89235 + ... + 90664.

It is an arithmetic number, because the mean of its divisors is an integer number (11333700).

Almost surely, 2^128627785 is an apocalyptic number.

It is an amenable number.

128627785 is a deficient number, since it is larger than the sum of its proper divisors (52711415).

128627785 is a wasteful number, since it uses less digits than its factorization.

128627785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179928.

The product of its digits is 376320, while the sum is 46.

The square root of 128627785 is about 11341.4190029290. The cubic root of 128627785 is about 504.7909928149.

The spelling of 128627785 in words is "one hundred twenty-eight million, six hundred twenty-seven thousand, seven hundred eighty-five".