128855492 has 12 divisors (see below), whose sum is σ = 237365520. Its totient is φ = 61036776.

The previous prime is 128855491. The next prime is 128855501. The reversal of 128855492 is 294558821.

It is not an unprimeable number, because it can be changed into a prime (128855491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847658 + ... + 847809.

It is an arithmetic number, because the mean of its divisors is an integer number (19780460).

Almost surely, 2^128855492 is an apocalyptic number.

It is an amenable number.

128855492 is a deficient number, since it is larger than the sum of its proper divisors (108510028).

128855492 is a wasteful number, since it uses less digits than its factorization.

128855492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695490 (or 1695488 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 128855492 is about 11351.4532990274. The cubic root of 128855492 is about 505.0886907587.

The spelling of 128855492 in words is "one hundred twenty-eight million, eight hundred fifty-five thousand, four hundred ninety-two".