22400665 has 8 divisors (see below), whose sum is σ = 30720960. Its totient is φ = 15360432.

The previous prime is 22400663. The next prime is 22400669. The reversal of 22400665 is 56600422.

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

It is a cyclic number.

It is not a de Polignac number, because 22400665 - 2¹ = 22400663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22400663) 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, 319975 + ... + 320044.

It is an arithmetic number, because the mean of its divisors is an integer number (3840120).

Almost surely, 2^22400665 is an apocalyptic number.

It is an amenable number.

22400665 is a deficient number, since it is larger than the sum of its proper divisors (8320295).

22400665 is an equidigital number, since it uses as much as digits as its factorization.

22400665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640031.

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

The square root of 22400665 is about 4732.9340794057. The cubic root of 22400665 is about 281.8947388107.

The spelling of 22400665 in words is "twenty-two million, four hundred thousand, six hundred sixty-five".