128890914 has 16 divisors (see below), whose sum is σ = 258251328. Its totient is φ = 42885392.

The previous prime is 128890913. The next prime is 128890961. The reversal of 128890914 is 419098821.

It is a super-2 number, since 2×128890914² = 33225735423510792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128890913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15942 + ... + 22625.

It is an arithmetic number, because the mean of its divisors is an integer number (16140708).

Almost surely, 2^128890914 is an apocalyptic number.

128890914 is an abundant number, since it is smaller than the sum of its proper divisors (129360414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128890914 is a wasteful number, since it uses less digits than its factorization.

128890914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39129.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 128890914 is about 11353.0134325649. The cubic root of 128890914 is about 505.1349689891.

The spelling of 128890914 in words is "one hundred twenty-eight million, eight hundred ninety thousand, nine hundred fourteen".