331620044 has 18 divisors (see below), whose sum is σ = 675084060. Its totient is φ = 142122792.

The previous prime is 331620043. The next prime is 331620089. The reversal of 331620044 is 440026133.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (331620043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845774 + ... + 846165.

It is an arithmetic number, because the mean of its divisors is an integer number (37504670).

Almost surely, 2^331620044 is an apocalyptic number.

It is an amenable number.

331620044 is an abundant number, since it is smaller than the sum of its proper divisors (343464016).

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

331620044 is a wasteful number, since it uses less digits than its factorization.

331620044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691957 (or 1691948 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 331620044 is about 18210.4377761766. The cubic root of 331620044 is about 692.1713047783.

Adding to 331620044 its reverse (440026133), we get a palindrome (771646177).

The spelling of 331620044 in words is "three hundred thirty-one million, six hundred twenty thousand, forty-four".