128158870 has 32 divisors (see below), whose sum is σ = 264031488. Its totient is φ = 43875168.

The previous prime is 128158817. The next prime is 128158871. The reversal of 128158870 is 78851821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128158871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89097 + ... + 90523.

It is an arithmetic number, because the mean of its divisors is an integer number (8250984).

Almost surely, 2^128158870 is an apocalyptic number.

128158870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128158870 is an abundant number, since it is smaller than the sum of its proper divisors (135872618).

128158870 is a wasteful number, since it uses less digits than its factorization.

128158870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 128158870 is about 11320.7274501244. The cubic root of 128158870 is about 504.1768375639.

The spelling of 128158870 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, eight hundred seventy".