22700128 has 24 divisors (see below), whose sum is σ = 48754440. Its totient is φ = 10318080.

The previous prime is 22700123. The next prime is 22700131. The reversal of 22700128 is 82100722.

It is a super-2 number, since 2×22700128² = 1030591622432768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22700099 and 22700108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22700123) 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, 31893 + ... + 32596.

It is an arithmetic number, because the mean of its divisors is an integer number (2031435).

Almost surely, 2^22700128 is an apocalyptic number.

It is an amenable number.

22700128 is an abundant number, since it is smaller than the sum of its proper divisors (26054312).

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

22700128 is a wasteful number, since it uses less digits than its factorization.

22700128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64510 (or 64502 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 22700128 is about 4764.4651326251. The cubic root of 22700128 is about 283.1453510477.

The spelling of 22700128 in words is "twenty-two million, seven hundred thousand, one hundred twenty-eight".