22931928 has 48 divisors (see below), whose sum is σ = 62972520. Its totient is φ = 7537536.

The previous prime is 22931921. The next prime is 22931933. The reversal of 22931928 is 82913922.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22931892 and 22931901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22931921) 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, 3075 + ... + 7437.

Almost surely, 2^22931928 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 22931928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31486260).

22931928 is an abundant number, since it is smaller than the sum of its proper divisors (40040592).

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

22931928 is a wasteful number, since it uses less digits than its factorization.

22931928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448 (or 4441 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 22931928 is about 4788.7292677703. The cubic root of 22931928 is about 284.1058588376.

The spelling of 22931928 in words is "twenty-two million, nine hundred thirty-one thousand, nine hundred twenty-eight".