128693612 has 18 divisors (see below), whose sum is σ = 237693708. Its totient is φ = 60959448.

The previous prime is 128693603. The next prime is 128693633. The reversal of 128693612 is 216396821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43118 + ... + 46005.

It is an arithmetic number, because the mean of its divisors is an integer number (13205206).

Almost surely, 2^128693612 is an apocalyptic number.

It is an amenable number.

128693612 is a deficient number, since it is larger than the sum of its proper divisors (109000096).

128693612 is a wasteful number, since it uses less digits than its factorization.

128693612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89165 (or 89144 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 128693612 is about 11344.3206936334. The cubic root of 128693612 is about 504.8770893242.

The spelling of 128693612 in words is "one hundred twenty-eight million, six hundred ninety-three thousand, six hundred twelve".