128866370 has 16 divisors (see below), whose sum is σ = 232295040. Its totient is φ = 51471984.

The previous prime is 128866357. The next prime is 128866457. The reversal of 128866370 is 73668821.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1772 + ... + 16151.

It is an arithmetic number, because the mean of its divisors is an integer number (14518440).

Almost surely, 2^128866370 is an apocalyptic number.

128866370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128866370 is a deficient number, since it is larger than the sum of its proper divisors (103428670).

128866370 is a wasteful number, since it uses less digits than its factorization.

128866370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 128866370 is about 11351.9324346122. The cubic root of 128866370 is about 505.1029035798.

The spelling of 128866370 in words is "one hundred twenty-eight million, eight hundred sixty-six thousand, three hundred seventy".