2781862 has 4 divisors (see below), whose sum is σ = 4172796. Its totient is φ = 1390930.

The previous prime is 2781853. The next prime is 2781887. The reversal of 2781862 is 2681872.

2781862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695464 + ... + 695467.

It is an arithmetic number, because the mean of its divisors is an integer number (1043199).

2^2781862 is an apocalyptic number.

2781862 is a deficient number, since it is larger than the sum of its proper divisors (1390934).

2781862 is a wasteful number, since it uses less digits than its factorization.

2781862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390933.

The product of its digits is 10752, while the sum is 34.

The square root of 2781862 is about 1667.8914832806. The cubic root of 2781862 is about 140.6409724738.

The spelling of 2781862 in words is "two million, seven hundred eighty-one thousand, eight hundred sixty-two".