22400864 has 12 divisors (see below), whose sum is σ = 44101764. Its totient is φ = 11200416.

The previous prime is 22400863. The next prime is 22400881. The reversal of 22400864 is 46800422.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400863) by changing a digit.

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 as a sum of consecutive naturals, namely, 349982 + ... + 350045.

It is an arithmetic number, because the mean of its divisors is an integer number (3675147).

Almost surely, 2^22400864 is an apocalyptic number.

It is an amenable number.

22400864 is a deficient number, since it is larger than the sum of its proper divisors (21700900).

22400864 is an equidigital number, since it uses as much as digits as its factorization.

22400864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700037 (or 700029 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 22400864 is about 4732.9551022591. The cubic root of 22400864 is about 281.8955735611.

The spelling of 22400864 in words is "twenty-two million, four hundred thousand, eight hundred sixty-four".