2781164 has 12 divisors (see below), whose sum is σ = 4926264. Its totient is φ = 1373664.

The previous prime is 2781143. The next prime is 2781169. The reversal of 2781164 is 4611872.

It is not an unprimeable number, because it can be changed into a prime (2781169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857 + ... + 4520.

It is an arithmetic number, because the mean of its divisors is an integer number (410522).

2^2781164 is an apocalyptic number.

It is an amenable number.

2781164 is a deficient number, since it is larger than the sum of its proper divisors (2145100).

2781164 is a wasteful number, since it uses less digits than its factorization.

2781164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8464 (or 8462 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 2781164 is about 1667.6822239264. The cubic root of 2781164 is about 140.6292086971.

The spelling of 2781164 in words is "two million, seven hundred eighty-one thousand, one hundred sixty-four".