422398644 has 24 divisors (see below), whose sum is σ = 987275520. Its totient is φ = 140559744.

The previous prime is 422398637. The next prime is 422398661. The reversal of 422398644 is 446893224.

It is a super-2 number, since 2×422398644² = 356841228906077472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 422398596 and 422398605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22564 + ... + 36795.

It is an arithmetic number, because the mean of its divisors is an integer number (41136480).

Almost surely, 2^422398644 is an apocalyptic number.

It is an amenable number.

422398644 is an abundant number, since it is smaller than the sum of its proper divisors (564876876).

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

422398644 is a wasteful number, since it uses less digits than its factorization.

422398644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59959 (or 59957 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The square root of 422398644 is about 20552.3391369450. The cubic root of 422398644 is about 750.3101792563.

The spelling of 422398644 in words is "four hundred twenty-two million, three hundred ninety-eight thousand, six hundred forty-four".