22520640 has 56 divisors (see below), whose sum is σ = 71506080. Its totient is φ = 6005248.

The previous prime is 22520633. The next prime is 22520669. The reversal of 22520640 is 4602522.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10770 + ... + 12689.

Almost surely, 2^22520640 is an apocalyptic number.

22520640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22520640 is an abundant number, since it is smaller than the sum of its proper divisors (48985440).

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

22520640 is a wasteful number, since it uses less digits than its factorization.

22520640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23479 (or 23469 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22520640 is about 4745.5916385631. The cubic root of 22520640 is about 282.3971066534.

The spelling of 22520640 in words is "twenty-two million, five hundred twenty thousand, six hundred forty".