122636128 has 24 divisors (see below), whose sum is σ = 249767280. Its totient is φ = 59203200.

The previous prime is 122636123. The next prime is 122636149. The reversal of 122636128 is 821636221.

It is a self number, because there is not a number n which added to its sum of digits gives 122636128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122636123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65148 + ... + 67003.

It is an arithmetic number, because the mean of its divisors is an integer number (10406970).

Almost surely, 2^122636128 is an apocalyptic number.

It is an amenable number.

122636128 is an abundant number, since it is smaller than the sum of its proper divisors (127131152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122636128 is a wasteful number, since it uses less digits than its factorization.

122636128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132190 (or 132182 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 122636128 is about 11074.1197392840. The cubic root of 122636128 is about 496.8280912060.

The spelling of 122636128 in words is "one hundred twenty-two million, six hundred thirty-six thousand, one hundred twenty-eight".