22605940 has 24 divisors (see below), whose sum is σ = 54254592. Its totient is φ = 7750560.

The previous prime is 22605923. The next prime is 22605943. The reversal of 22605940 is 4950622.

It is a super-2 number, since 2×22605940² = 1022057046567200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22605899 and 22605908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22605943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80596 + ... + 80875.

It is an arithmetic number, because the mean of its divisors is an integer number (2260608).

Almost surely, 2^22605940 is an apocalyptic number.

22605940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22605940 is an abundant number, since it is smaller than the sum of its proper divisors (31648652).

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

22605940 is a wasteful number, since it uses less digits than its factorization.

22605940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161487 (or 161485 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22605940 is about 4754.5704327520. The cubic root of 22605940 is about 282.7531966555.

The spelling of 22605940 in words is "twenty-two million, six hundred five thousand, nine hundred forty".