331871904 has 432 divisors, whose sum is σ = 1244382048. Its totient is φ = 86220288.

The previous prime is 331871887. The next prime is 331871923. The reversal of 331871904 is 409178133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×331871904² = 220277921329170432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4953279 + ... + 4953345.

It is an arithmetic number, because the mean of its divisors is an integer number (2880514).

Almost surely, 2^331871904 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 331871904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622191024).

331871904 is an abundant number, since it is smaller than the sum of its proper divisors (912510144).

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

331871904 is a wasteful number, since it uses less digits than its factorization.

331871904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 331871904 is about 18217.3517285032. The cubic root of 331871904 is about 692.3464913640.

The spelling of 331871904 in words is "three hundred thirty-one million, eight hundred seventy-one thousand, nine hundred four".