128866832 has 10 divisors (see below), whose sum is σ = 249679518. Its totient is φ = 64433408.

The previous prime is 128866823. The next prime is 128866849. The reversal of 128866832 is 238668821.

It can be written as a sum of positive squares in only one way, i.e., 93392896 + 35473936 = 9664^2 + 5956^2 .

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 as a sum of consecutive naturals, namely, 4027073 + ... + 4027104.

Almost surely, 2^128866832 is an apocalyptic number.

It is an amenable number.

128866832 is a deficient number, since it is larger than the sum of its proper divisors (120812686).

128866832 is an equidigital number, since it uses as much as digits as its factorization.

128866832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054185 (or 8054179 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 128866832 is about 11351.9527835523. The cubic root of 128866832 is about 505.1035071955.

The spelling of 128866832 in words is "one hundred twenty-eight million, eight hundred sixty-six thousand, eight hundred thirty-two".