331042404 has 192 divisors, whose sum is σ = 1034514432. Its totient is φ = 79833600.

The previous prime is 331042403. The next prime is 331042409. The reversal of 331042404 is 404240133.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (331042403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 786114 + ... + 786534.

It is an arithmetic number, because the mean of its divisors is an integer number (5388096).

Almost surely, 2^331042404 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 331042404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517257216).

331042404 is an abundant number, since it is smaller than the sum of its proper divisors (703472028).

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

331042404 is a wasteful number, since it uses less digits than its factorization.

331042404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 331042404 is about 18194.5707286542. The cubic root of 331042404 is about 691.7691797025.

Adding to 331042404 its reverse (404240133), we get a palindrome (735282537).

The spelling of 331042404 in words is "three hundred thirty-one million, forty-two thousand, four hundred four".