2831040 has 84 divisors (see below), whose sum is σ = 9747504. Its totient is φ = 754176.

The previous prime is 2831039. The next prime is 2831051. The reversal of 2831040 is 401382.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

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, 2389 + ... + 3371.

2^2831040 is an apocalyptic number.

2831040 is a gapful number since it is divisible by the number (20) 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 2831040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4873752).

2831040 is an abundant number, since it is smaller than the sum of its proper divisors (6916464).

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

2831040 is a wasteful number, since it uses less digits than its factorization.

2831040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2831040 is about 1682.5694636478. The cubic root of 2831040 is about 141.4648907554.

The spelling of 2831040 in words is "two million, eight hundred thirty-one thousand, forty".