128866270 has 32 divisors (see below), whose sum is σ = 255622752. Its totient is φ = 46472832.

The previous prime is 128866261. The next prime is 128866289. The reversal of 128866270 is 72668821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5937 + ... + 17116.

It is an arithmetic number, because the mean of its divisors is an integer number (7988211).

Almost surely, 2^128866270 is an apocalyptic number.

128866270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128866270 is a deficient number, since it is larger than the sum of its proper divisors (126756482).

128866270 is a wasteful number, since it uses less digits than its factorization.

128866270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23116.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 128866270 is about 11351.9280300749. The cubic root of 128866270 is about 505.1027729269.

The spelling of 128866270 in words is "one hundred twenty-eight million, eight hundred sixty-six thousand, two hundred seventy".