22689920 has 96 divisors (see below), whose sum is σ = 59826060. Its totient is φ = 8222720.

The previous prime is 22689913. The next prime is 22689929. The reversal of 22689920 is 2998622.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 937024 = 4664^2 + 968^2 .

It is not an unprimeable number, because it can be changed into a prime (22689929) 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, 77294 + ... + 77586.

Almost surely, 2^22689920 is an apocalyptic number.

22689920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22689920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29913030).

22689920 is an abundant number, since it is smaller than the sum of its proper divisors (37136140).

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

22689920 is a wasteful number, since it uses less digits than its factorization.

22689920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 311 counting only the distinct ones).

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

The square root of 22689920 is about 4763.3937481590. The cubic root of 22689920 is about 283.1029022253.

The spelling of 22689920 in words is "twenty-two million, six hundred eighty-nine thousand, nine hundred twenty".