128170490 has 32 divisors (see below), whose sum is σ = 275132160. Its totient is φ = 42033024.

The previous prime is 128170481. The next prime is 128170507. The reversal of 128170490 is 94071821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38195 + ... + 41414.

It is an arithmetic number, because the mean of its divisors is an integer number (8597880).

Almost surely, 2^128170490 is an apocalyptic number.

128170490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128170490 is an abundant number, since it is smaller than the sum of its proper divisors (146961670).

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

128170490 is a wasteful number, since it uses less digits than its factorization.

128170490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79646.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 128170490 is about 11321.2406563945. The cubic root of 128170490 is about 504.1920747920.

The spelling of 128170490 in words is "one hundred twenty-eight million, one hundred seventy thousand, four hundred ninety".