128622699 has 12 divisors (see below), whose sum is σ = 190320312. Its totient is φ = 83656800.

The previous prime is 128622643. The next prime is 128622701. The reversal of 128622699 is 996226821.

128622699 is a `hidden beast` number, since 12 + 8 + 622 + 6 + 9 + 9 = 666.

It is not a de Polignac number, because 128622699 - 2⁸ = 128622443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128622199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173917 + ... + 174654.

It is an arithmetic number, because the mean of its divisors is an integer number (15860026).

Almost surely, 2^128622699 is an apocalyptic number.

128622699 is a deficient number, since it is larger than the sum of its proper divisors (61697613).

128622699 is a wasteful number, since it uses less digits than its factorization.

128622699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348618 (or 348615 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 128622699 is about 11341.1947783291. The cubic root of 128622699 is about 504.7843395069.

The spelling of 128622699 in words is "one hundred twenty-eight million, six hundred twenty-two thousand, six hundred ninety-nine".