331130646 has 128 divisors (see below), whose sum is σ = 928005120. Its totient is φ = 85017600.

The previous prime is 331130629. The next prime is 331130663. The reversal of 331130646 is 646031133.

331130646 is a `hidden beast` number, since 3 + 3 + 1 + 13 + 0 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (331130629) and next prime (331130663).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 402916 + ... + 403736.

It is an arithmetic number, because the mean of its divisors is an integer number (7250040).

Almost surely, 2^331130646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331130646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464002560).

331130646 is an abundant number, since it is smaller than the sum of its proper divisors (596874474).

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

331130646 is a wasteful number, since it uses less digits than its factorization.

331130646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 331130646 is about 18196.9955212392. The cubic root of 331130646 is about 691.8306397775.

Adding to 331130646 its reverse (646031133), we get a palindrome (977161779).

It can be divided in two parts, 331130 and 646, that added together give a 4-th power (331776 = 24⁴).

The spelling of 331130646 in words is "three hundred thirty-one million, one hundred thirty thousand, six hundred forty-six".