331685444 has 6 divisors (see below), whose sum is σ = 580449534. Its totient is φ = 165842720.

The previous prime is 331685437. The next prime is 331685447. The reversal of 331685444 is 444586133.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 272580100 + 59105344 = 16510^2 + 7688^2 .

It is a super-2 number, since 2×331685444² = 220030467522954272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331685398 and 331685407.

It is not an unprimeable number, because it can be changed into a prime (331685447) 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 as a sum of consecutive naturals, namely, 41460677 + ... + 41460684.

It is an arithmetic number, because the mean of its divisors is an integer number (96741589).

Almost surely, 2^331685444 is an apocalyptic number.

It is an amenable number.

331685444 is a deficient number, since it is larger than the sum of its proper divisors (248764090).

331685444 is a wasteful number, since it uses less digits than its factorization.

331685444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82921365 (or 82921363 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 331685444 is about 18212.2333611230. The cubic root of 331685444 is about 692.2168036644.

The spelling of 331685444 in words is "three hundred thirty-one million, six hundred eighty-five thousand, four hundred forty-four".