22640065 has 8 divisors (see below), whose sum is σ = 31049280. Its totient is φ = 15524592.

The previous prime is 22640053. The next prime is 22640083. The reversal of 22640065 is 56004622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22640065 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323395 + ... + 323464.

It is an arithmetic number, because the mean of its divisors is an integer number (3881160).

Almost surely, 2^22640065 is an apocalyptic number.

It is an amenable number.

22640065 is a deficient number, since it is larger than the sum of its proper divisors (8409215).

22640065 is an equidigital number, since it uses as much as digits as its factorization.

22640065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646871.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 22640065 is about 4758.1577317277. The cubic root of 22640065 is about 282.8954026669.

Adding to 22640065 its reverse (56004622), we get a palindrome (78644687).

The spelling of 22640065 in words is "twenty-two million, six hundred forty thousand, sixty-five".