22055640 has 32 divisors (see below), whose sum is σ = 66167280. Its totient is φ = 5881472.

The previous prime is 22055633. The next prime is 22055651. The reversal of 22055640 is 4655022.

It is a super-3 number, since 3×22055640³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22055640.

It is a congruent number.

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, 91779 + ... + 92018.

Almost surely, 2^22055640 is an apocalyptic number.

22055640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22055640 is an abundant number, since it is smaller than the sum of its proper divisors (44111640).

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

22055640 is a wasteful number, since it uses less digits than its factorization.

22055640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183811 (or 183807 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 22055640 is about 4696.3432583234. The cubic root of 22055640 is about 280.4399546105.

The spelling of 22055640 in words is "twenty-two million, fifty-five thousand, six hundred forty".