128861170 has 16 divisors (see below), whose sum is σ = 234119808. Its totient is φ = 51062320.

The previous prime is 128861149. The next prime is 128861177. The reversal of 128861170 is 71168821.

It is a super-2 number, since 2×128861170² = 33210402267537800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128861177) 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, 59146 + ... + 61285.

It is an arithmetic number, because the mean of its divisors is an integer number (14632488).

Almost surely, 2^128861170 is an apocalyptic number.

128861170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128861170 is a deficient number, since it is larger than the sum of its proper divisors (105258638).

128861170 is a wasteful number, since it uses less digits than its factorization.

128861170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120545.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 128861170 is about 11351.7033964071. The cubic root of 128861170 is about 505.0961095383.

The spelling of 128861170 in words is "one hundred twenty-eight million, eight hundred sixty-one thousand, one hundred seventy".