128918862 has 24 divisors (see below), whose sum is σ = 288957240. Its totient is φ = 41490960.

The previous prime is 128918861. The next prime is 128918893. The reversal of 128918862 is 268819821.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128918861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122964 + ... + 124007.

It is an arithmetic number, because the mean of its divisors is an integer number (12039885).

Almost surely, 2^128918862 is an apocalyptic number.

128918862 is an abundant number, since it is smaller than the sum of its proper divisors (160038378).

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

128918862 is a wasteful number, since it uses less digits than its factorization.

128918862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247008 (or 247005 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 128918862 is about 11354.2442284813. The cubic root of 128918862 is about 505.1714765841.

The spelling of 128918862 in words is "one hundred twenty-eight million, nine hundred eighteen thousand, eight hundred sixty-two".