331606620 has 144 divisors (see below), whose sum is σ = 1081866240. Its totient is φ = 81952128.

The previous prime is 331606603. The next prime is 331606621. The reversal of 331606620 is 26606133.

331606620 is a `hidden beast` number, since 3 + 31 + 6 + 0 + 6 + 620 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331606621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159709 + ... + 161771.

It is an arithmetic number, because the mean of its divisors is an integer number (7512960).

Almost surely, 2^331606620 is an apocalyptic number.

331606620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331606620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (540933120).

331606620 is an abundant number, since it is smaller than the sum of its proper divisors (750259620).

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

331606620 is a wasteful number, since it uses less digits than its factorization.

331606620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2139 counting only the distinct ones).

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

The square root of 331606620 is about 18210.0691926198. The cubic root of 331606620 is about 692.1619649398.

The spelling of 331606620 in words is "three hundred thirty-one million, six hundred six thousand, six hundred twenty".