2813880 has 64 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 740480.

The previous prime is 2813879. The next prime is 2813897. The reversal of 2813880 is 883182.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 15631 + ... + 15809.

It is an arithmetic number, because the mean of its divisors is an integer number (133650).

2^2813880 is an apocalyptic number.

2813880 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 2813880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4276800).

2813880 is an abundant number, since it is smaller than the sum of its proper divisors (5739720).

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

2813880 is a wasteful number, since it uses less digits than its factorization.

2813880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 2813880 is about 1677.4623691755. The cubic root of 2813880 is about 141.1784873078.

The spelling of 2813880 in words is "two million, eight hundred thirteen thousand, eight hundred eighty".