331866072 has 96 divisors (see below), whose sum is σ = 949974480. Its totient is φ = 108501120.

The previous prime is 331866043. The next prime is 331866083. The reversal of 331866072 is 270668133.

It is a happy number.

331866072 is a `hidden beast` number, since 33 + 18 + 6 + 607 + 2 = 666.

It is a super-2 number, since 2×331866072² = 220270179489418368, 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101422 + ... + 104642.

Almost surely, 2^331866072 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 331866072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474987240).

331866072 is an abundant number, since it is smaller than the sum of its proper divisors (618108408).

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

331866072 is a wasteful number, since it uses less digits than its factorization.

331866072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295 (or 3279 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 331866072 is about 18217.1916606265. The cubic root of 331866072 is about 692.3424357948.

The spelling of 331866072 in words is "three hundred thirty-one million, eight hundred sixty-six thousand, seventy-two".