3121328 has 60 divisors (see below), whose sum is σ = 7387920. Its totient is φ = 1249920.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121328 is 8231213.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100673 + ... + 100703.

It is an arithmetic number, because the mean of its divisors is an integer number (123132).

Almost surely, 2^3121328 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 3121328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3693960).

3121328 is an abundant number, since it is smaller than the sum of its proper divisors (4266592).

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

3121328 is a wasteful number, since it uses less digits than its factorization.

3121328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 69 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 3121328 is about 1766.7280492481. The cubic root of 3121328 is about 146.1436005035.

The spelling of 3121328 in words is "three million, one hundred twenty-one thousand, three hundred twenty-eight".