128807115 has 16 divisors (see below), whose sum is σ = 206899488. Its totient is φ = 68427776.

The previous prime is 128807111. The next prime is 128807131. The reversal of 128807115 is 511708821.

It is a cyclic number.

It is not a de Polignac number, because 128807115 - 2² = 128807111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128807111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12852 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (12931218).

Almost surely, 2^128807115 is an apocalyptic number.

128807115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128807115 is a deficient number, since it is larger than the sum of its proper divisors (78092373).

128807115 is a wasteful number, since it uses less digits than its factorization.

128807115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33678.

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 128807115 is about 11349.3222264592. The cubic root of 128807115 is about 505.0254733417.

The spelling of 128807115 in words is "one hundred twenty-eight million, eight hundred seven thousand, one hundred fifteen".