426404664 has 72 divisors (see below), whose sum is σ = 1343403360. Its totient is φ = 121828896.

The previous prime is 426404581. The next prime is 426404689. The reversal of 426404664 is 466404624.

It is a happy number.

426404664 is a `hidden beast` number, since 4 + 2 + 640 + 4 + 6 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 56904 + ... + 63959.

It is an arithmetic number, because the mean of its divisors is an integer number (18658380).

Almost surely, 2^426404664 is an apocalyptic number.

It is an amenable number.

426404664 is an abundant number, since it is smaller than the sum of its proper divisors (916998696).

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

426404664 is a wasteful number, since it uses less digits than its factorization.

426404664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120889 (or 120875 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 426404664 is about 20649.5681310772. The cubic root of 426404664 is about 752.6746953340.

The spelling of 426404664 in words is "four hundred twenty-six million, four hundred four thousand, six hundred sixty-four".