128893278 has 16 divisors (see below), whose sum is σ = 257921280. Its totient is φ = 42941976.

The previous prime is 128893267. The next prime is 128893301. The reversal of 128893278 is 872398821.

It is a super-2 number, since 2×128893278² = 33226954227170568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10293 + ... + 19071.

It is an arithmetic number, because the mean of its divisors is an integer number (16120080).

Almost surely, 2^128893278 is an apocalyptic number.

128893278 is an abundant number, since it is smaller than the sum of its proper divisors (129028002).

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

128893278 is a wasteful number, since it uses less digits than its factorization.

128893278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11231.

The product of its digits is 387072, while the sum is 48.

The square root of 128893278 is about 11353.1175454146. The cubic root of 128893278 is about 505.1380572124.

The spelling of 128893278 in words is "one hundred twenty-eight million, eight hundred ninety-three thousand, two hundred seventy-eight".