331541628 has 48 divisors (see below), whose sum is σ = 850612224. Its totient is φ = 99671040.

The previous prime is 331541491. The next prime is 331541629. The reversal of 331541628 is 826145133.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331541629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6876 + ... + 26652.

It is an arithmetic number, because the mean of its divisors is an integer number (17721088).

Almost surely, 2^331541628 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 331541628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425306112).

331541628 is an abundant number, since it is smaller than the sum of its proper divisors (519070596).

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

331541628 is a wasteful number, since it uses less digits than its factorization.

331541628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19922 (or 19920 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 331541628 is about 18208.2845979516. The cubic root of 331541628 is about 692.1167427529.

The spelling of 331541628 in words is "three hundred thirty-one million, five hundred forty-one thousand, six hundred twenty-eight".