122569728 has 88 divisors (see below), whose sum is σ = 346057632. Its totient is φ = 38436864.

The previous prime is 122569723. The next prime is 122569729. The reversal of 122569728 is 827965221.

It is a self number, because there is not a number n which added to its sum of digits gives 122569728.

It is not an unprimeable number, because it can be changed into a prime (122569723) 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, 51051 + ... + 53397.

Almost surely, 2^122569728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122569728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173028816).

122569728 is an abundant number, since it is smaller than the sum of its proper divisors (223487904).

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

122569728 is a wasteful number, since it uses less digits than its factorization.

122569728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2369 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 122569728 is about 11071.1213524195. The cubic root of 122569728 is about 496.7384076261.

The spelling of 122569728 in words is "one hundred twenty-two million, five hundred sixty-nine thousand, seven hundred twenty-eight".