422644684 has 96 divisors (see below), whose sum is σ = 995452416. Its totient is φ = 151956480.

The previous prime is 422644681. The next prime is 422644693. The reversal of 422644684 is 486446224.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (422644681) 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 in 31 ways as a sum of consecutive naturals, for example, 276747 + ... + 278269.

It is an arithmetic number, because the mean of its divisors is an integer number (10369296).

Almost surely, 2^422644684 is an apocalyptic number.

422644684 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422644684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497726208).

422644684 is an abundant number, since it is smaller than the sum of its proper divisors (572807732).

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

422644684 is a wasteful number, since it uses less digits than its factorization.

422644684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1613 counting only the distinct ones).

The product of its digits is 294912, while the sum is 40.

The square root of 422644684 is about 20558.3239589223. The cubic root of 422644684 is about 750.4558319372.

The spelling of 422644684 in words is "four hundred twenty-two million, six hundred forty-four thousand, six hundred eighty-four".