426831444 has 144 divisors (see below), whose sum is σ = 1276486848. Its totient is φ = 123545088.

The previous prime is 426831439. The next prime is 426831463. The reversal of 426831444 is 444138624.

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 = 426831399 and 426831408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213819 + ... + 215805.

It is an arithmetic number, because the mean of its divisors is an integer number (8864492).

Almost surely, 2^426831444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426831444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638243424).

426831444 is an abundant number, since it is smaller than the sum of its proper divisors (849655404).

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

426831444 is a wasteful number, since it uses less digits than its factorization.

426831444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2022 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 426831444 is about 20659.8994189226. The cubic root of 426831444 is about 752.9257240112.

The spelling of 426831444 in words is "four hundred twenty-six million, eight hundred thirty-one thousand, four hundred forty-four".