2811980 has 24 divisors (see below), whose sum is σ = 6162912. Its totient is φ = 1075712.

The previous prime is 2811973. The next prime is 2811983. The reversal of 2811980 is 891182.

It is not an unprimeable number, because it can be changed into a prime (2811983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597 + ... + 3516.

It is an arithmetic number, because the mean of its divisors is an integer number (256788).

2^2811980 is an apocalyptic number.

2811980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2811980 is an abundant number, since it is smaller than the sum of its proper divisors (3350932).

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

2811980 is a wasteful number, since it uses less digits than its factorization.

2811980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145 (or 6143 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 2811980 is about 1676.8959419117. The cubic root of 2811980 is about 141.1467044407.

The spelling of 2811980 in words is "two million, eight hundred eleven thousand, nine hundred eighty".