128894115 has 16 divisors (see below), whose sum is σ = 235692288. Its totient is φ = 58922976.

The previous prime is 128894113. The next prime is 128894137. The reversal of 128894115 is 511498821.

It is not a de Polignac number, because 128894115 - 2¹ = 128894113 is a prime.

It is a super-2 number, since 2×128894115² = 33227385763266450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128894113) 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, 613677 + ... + 613886.

It is an arithmetic number, because the mean of its divisors is an integer number (14730768).

Almost surely, 2^128894115 is an apocalyptic number.

128894115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128894115 is a deficient number, since it is larger than the sum of its proper divisors (106798173).

128894115 is a wasteful number, since it uses less digits than its factorization.

128894115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227578.

The product of its digits is 23040, while the sum is 39.

The square root of 128894115 is about 11353.1544074764. The cubic root of 128894115 is about 505.1391506225.

The spelling of 128894115 in words is "one hundred twenty-eight million, eight hundred ninety-four thousand, one hundred fifteen".