22507428 has 12 divisors (see below), whose sum is σ = 52517360. Its totient is φ = 7502472.

The previous prime is 22507427. The next prime is 22507469. The reversal of 22507428 is 82470522.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 22507395 and 22507404.

It is not an unprimeable number, because it can be changed into a prime (22507427) 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, 937798 + ... + 937821.

Almost surely, 2^22507428 is an apocalyptic number.

It is an amenable number.

22507428 is an abundant number, since it is smaller than the sum of its proper divisors (30009932).

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

22507428 is a wasteful number, since it uses less digits than its factorization.

22507428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875626 (or 1875624 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 22507428 is about 4744.1994055899. The cubic root of 22507428 is about 282.3418719823.

The spelling of 22507428 in words is "twenty-two million, five hundred seven thousand, four hundred twenty-eight".