128900415 has 32 divisors (see below), whose sum is σ = 242081280. Its totient is φ = 57331584.

The previous prime is 128900413. The next prime is 128900491. The reversal of 128900415 is 514009821.

It is a happy number.

It is not a de Polignac number, because 128900415 - 2¹ = 128900413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128900413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12705 + ... + 20474.

It is an arithmetic number, because the mean of its divisors is an integer number (7565040).

Almost surely, 2^128900415 is an apocalyptic number.

128900415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128900415 is a deficient number, since it is larger than the sum of its proper divisors (113180865).

128900415 is a wasteful number, since it uses less digits than its factorization.

128900415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33231.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 128900415 is about 11353.4318600148. The cubic root of 128900415 is about 505.1473804392.

The spelling of 128900415 in words is "one hundred twenty-eight million, nine hundred thousand, four hundred fifteen".