22012928 has 88 divisors (see below), whose sum is σ = 52272192. Its totient is φ = 9068544.

The previous prime is 22012927. The next prime is 22012933. The reversal of 22012928 is 82921022.

It is a junction number, because it is equal to n+sod(n) for n = 22012897 and 22012906.

It is not an unprimeable number, because it can be changed into a prime (22012927) 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, 265175 + ... + 265257.

Almost surely, 2^22012928 is an apocalyptic number.

22012928 is a gapful number since it is divisible by the number (28) 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 22012928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26136096).

22012928 is an abundant number, since it is smaller than the sum of its proper divisors (30259264).

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

22012928 is an equidigital number, since it uses as much as digits as its factorization.

22012928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22012928 is about 4691.7936868537. The cubic root of 22012928 is about 280.2588083248.

The spelling of 22012928 in words is "twenty-two million, twelve thousand, nine hundred twenty-eight".