128868586 has 32 divisors (see below), whose sum is σ = 251486208. Its totient is φ = 48024240.

The previous prime is 128868577. The next prime is 128868587. The reversal of 128868586 is 685868821.

It is a super-2 number, since 2×128868586² = 33214224915278792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128868587) 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, 14650 + ... + 21733.

It is an arithmetic number, because the mean of its divisors is an integer number (7858944).

Almost surely, 2^128868586 is an apocalyptic number.

128868586 is a deficient number, since it is larger than the sum of its proper divisors (122617622).

128868586 is a wasteful number, since it uses less digits than its factorization.

128868586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36426.

The product of its digits is 1474560, while the sum is 52.

The square root of 128868586 is about 11352.0300387199. The cubic root of 128868586 is about 505.1057988313.

The spelling of 128868586 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, five hundred eighty-six".