2771980 has 12 divisors (see below), whose sum is σ = 5821200. Its totient is φ = 1108784.

The previous prime is 2771971. The next prime is 2771999. The reversal of 2771980 is 891772.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69280 + ... + 69319.

It is an arithmetic number, because the mean of its divisors is an integer number (485100).

2^2771980 is an apocalyptic number.

2771980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2771980 is an abundant number, since it is smaller than the sum of its proper divisors (3049220).

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

2771980 is a wasteful number, since it uses less digits than its factorization.

2771980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138608 (or 138606 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2771980 is about 1664.9264248008. The cubic root of 2771980 is about 140.4742420581.

The spelling of 2771980 in words is "two million, seven hundred seventy-one thousand, nine hundred eighty".