128941786 has 16 divisors (see below), whose sum is σ = 198619200. Its totient is φ = 62762844.

The previous prime is 128941777. The next prime is 128941789. The reversal of 128941786 is 687149821.

It is not an unprimeable number, because it can be changed into a prime (128941789) 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, 1251811 + ... + 1251913.

It is an arithmetic number, because the mean of its divisors is an integer number (12413700).

Almost surely, 2^128941786 is an apocalyptic number.

128941786 is a deficient number, since it is larger than the sum of its proper divisors (69677414).

128941786 is an frugal number, since it uses more digits than its factorization.

128941786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 164 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 128941786 is about 11355.2536739608. The cubic root of 128941786 is about 505.2014175470.

The spelling of 128941786 in words is "one hundred twenty-eight million, nine hundred forty-one thousand, seven hundred eighty-six".