3122840 has 64 divisors (see below), whose sum is σ = 8467200. Its totient is φ = 1012608.

The previous prime is 3122827. The next prime is 3122851. The reversal of 3122840 is 482213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5027 + ... + 5613.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

Almost surely, 2^3122840 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 3122840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4233600).

3122840 is an abundant number, since it is smaller than the sum of its proper divisors (5344360).

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

3122840 is a wasteful number, since it uses less digits than its factorization.

3122840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 3122840 is about 1767.1559071004. The cubic root of 3122840 is about 146.1671944624.

The spelling of 3122840 in words is "three million, one hundred twenty-two thousand, eight hundred forty".