331644126 has 128 divisors (see below), whose sum is σ = 826122240. Its totient is φ = 87436800.

The previous prime is 331644097. The next prime is 331644127. The reversal of 331644126 is 621446133.

It is a junction number, because it is equal to n+sod(n) for n = 331644093 and 331644102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331644127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1001781 + ... + 1002111.

It is an arithmetic number, because the mean of its divisors is an integer number (6454080).

Almost surely, 2^331644126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331644126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413061120).

331644126 is an abundant number, since it is smaller than the sum of its proper divisors (494478114).

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

331644126 is a wasteful number, since it uses less digits than its factorization.

331644126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 10368, while the sum is 30.

The square root of 331644126 is about 18211.0989783703. The cubic root of 331644126 is about 692.1880593605.

The spelling of 331644126 in words is "three hundred thirty-one million, six hundred forty-four thousand, one hundred twenty-six".