22421928 has 32 divisors (see below), whose sum is σ = 57864960. Its totient is φ = 7232640.

The previous prime is 22421911. The next prime is 22421933. The reversal of 22421928 is 82912422.

It is a junction number, because it is equal to n+sod(n) for n = 22421895 and 22421904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14325 + ... + 15812.

It is an arithmetic number, because the mean of its divisors is an integer number (1808280).

Almost surely, 2^22421928 is an apocalyptic number.

It is an amenable number.

22421928 is an abundant number, since it is smaller than the sum of its proper divisors (35443032).

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

22421928 is a wasteful number, since it uses less digits than its factorization.

22421928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30177 (or 30173 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 22421928 is about 4735.1798276306. The cubic root of 22421928 is about 281.9839033114.

The spelling of 22421928 in words is "twenty-two million, four hundred twenty-one thousand, nine hundred twenty-eight".