22569640 has 32 divisors (see below), whose sum is σ = 50923080. Its totient is φ = 9002752.

The previous prime is 22569637. The next prime is 22569653. The reversal of 22569640 is 4696522.

It can be written as a sum of positive squares in 4 ways, for example, as 5080516 + 17489124 = 2254^2 + 4182^2 .

It is a super-3 number, since 3×22569640³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22569596 and 22569605.

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, 21774 + ... + 22786.

Almost surely, 2^22569640 is an apocalyptic number.

22569640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22569640 is an abundant number, since it is smaller than the sum of its proper divisors (28353440).

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

22569640 is a wasteful number, since it uses less digits than its factorization.

22569640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 22569640 is about 4750.7515194967. The cubic root of 22569640 is about 282.6017697917.

The spelling of 22569640 in words is "twenty-two million, five hundred sixty-nine thousand, six hundred forty".