331428 has 24 divisors (see below), whose sum is σ = 786240. Its totient is φ = 108640.

The previous prime is 331423. The next prime is 331447. The reversal of 331428 is 824133.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331428.

It is not an unprimeable number, because it can be changed into a prime (331423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2³³¹⁴²⁸ is an apocalyptic number.

It is an amenable number.

331428 is an abundant number, since it is smaller than the sum of its proper divisors (454812).

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

331428 is a wasteful number, since it uses less digits than its factorization.

331428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 465 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 331428 is about 575.6978374113. The cubic root of 331428 is about 69.2037664873.

The spelling of 331428 in words is "three hundred thirty-one thousand, four hundred twenty-eight".