422585640 has 64 divisors (see below), whose sum is σ = 1408622400. Its totient is φ = 112689216.

The previous prime is 422585633. The next prime is 422585687. The reversal of 422585640 is 46585224.

It is a happy number.

422585640 is a `hidden beast` number, since 4 + 2 + 2 + 5 + 8 + 5 + 640 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 422585595 and 422585604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194562 + ... + 196721.

It is an arithmetic number, because the mean of its divisors is an integer number (22009725).

Almost surely, 2^422585640 is an apocalyptic number.

422585640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

422585640 is an abundant number, since it is smaller than the sum of its proper divisors (986036760).

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

422585640 is a wasteful number, since it uses less digits than its factorization.

422585640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391303 (or 391293 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 422585640 is about 20556.8878967610. The cubic root of 422585640 is about 750.4208837650.

The spelling of 422585640 in words is "four hundred twenty-two million, five hundred eighty-five thousand, six hundred forty".