22510428 has 12 divisors (see below), whose sum is σ = 52524360. Its totient is φ = 7503472.

The previous prime is 22510417. The next prime is 22510451. The reversal of 22510428 is 82401522.

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 = 22510398 and 22510407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937923 + ... + 937946.

It is an arithmetic number, because the mean of its divisors is an integer number (4377030).

Almost surely, 2^22510428 is an apocalyptic number.

It is an amenable number.

22510428 is an abundant number, since it is smaller than the sum of its proper divisors (30013932).

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

22510428 is a wasteful number, since it uses less digits than its factorization.

22510428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875876 (or 1875874 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22510428 is about 4744.5155706352. The cubic root of 22510428 is about 282.3544158113.

The spelling of 22510428 in words is "twenty-two million, five hundred ten thousand, four hundred twenty-eight".