331426440 has 96 divisors (see below), whose sum is σ = 1079582400. Its totient is φ = 88179840.

The previous prime is 331426393. The next prime is 331426451. The reversal of 331426440 is 44624133.

331426440 is a `hidden beast` number, since 3 + 3 + 14 + 2 + 644 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226431 + ... + 227889.

It is an arithmetic number, because the mean of its divisors is an integer number (11245650).

Almost surely, 2^331426440 is an apocalyptic number.

331426440 is a gapful number since it is divisible by the number (30) 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 331426440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539791200).

331426440 is an abundant number, since it is smaller than the sum of its proper divisors (748155960).

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

331426440 is a wasteful number, since it uses less digits than its factorization.

331426440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2100 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 331426440 is about 18205.1212574924. The cubic root of 331426440 is about 692.0365790859.

The spelling of 331426440 in words is "three hundred thirty-one million, four hundred twenty-six thousand, four hundred forty".