331402032 has 240 divisors, whose sum is σ = 1072431360. Its totient is φ = 94735872.

The previous prime is 331402021. The next prime is 331402051. The reversal of 331402032 is 230204133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331401996 and 331402014.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1851319 + ... + 1851497.

It is an arithmetic number, because the mean of its divisors is an integer number (4468464).

Almost surely, 2^331402032 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 331402032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536215680).

331402032 is an abundant number, since it is smaller than the sum of its proper divisors (741029328).

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

331402032 is a wasteful number, since it uses less digits than its factorization.

331402032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 331402032 is about 18204.4508843305. The cubic root of 331402032 is about 692.0195902548.

Adding to 331402032 its reverse (230204133), we get a palindrome (561606165).

The spelling of 331402032 in words is "three hundred thirty-one million, four hundred two thousand, thirty-two".