422400664 has 16 divisors (see below), whose sum is σ = 905144400. Its totient is φ = 181028832.

The previous prime is 422400659. The next prime is 422400677. The reversal of 422400664 is 466004224.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3771379 + ... + 3771490.

It is an arithmetic number, because the mean of its divisors is an integer number (56571525).

Almost surely, 2^422400664 is an apocalyptic number.

It is an amenable number.

422400664 is an abundant number, since it is smaller than the sum of its proper divisors (482743736).

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

422400664 is a wasteful number, since it uses less digits than its factorization.

422400664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542882 (or 7542878 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 422400664 is about 20552.3882797109. The cubic root of 422400664 is about 750.3113753019.

Adding to 422400664 its reverse (466004224), we get a palindrome (888404888).

The spelling of 422400664 in words is "four hundred twenty-two million, four hundred thousand, six hundred sixty-four".