22640499 has 48 divisors (see below), whose sum is σ = 39626400. Its totient is φ = 12737088.

The previous prime is 22640477. The next prime is 22640539. The reversal of 22640499 is 99404622.

22640499 is a `hidden beast` number, since 2 + 2 + 640 + 4 + 9 + 9 = 666.

It is not a de Polignac number, because 22640499 - 2⁵ = 22640467 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640399) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144129 + ... + 144285.

It is an arithmetic number, because the mean of its divisors is an integer number (825550).

Almost surely, 2^22640499 is an apocalyptic number.

22640499 is a deficient number, since it is larger than the sum of its proper divisors (16985901).

22640499 is a wasteful number, since it uses less digits than its factorization.

22640499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 22640499 is about 4758.2033373953. The cubic root of 22640499 is about 282.8972103152.

The spelling of 22640499 in words is "twenty-two million, six hundred forty thousand, four hundred ninety-nine".