2768861 has 4 divisors (see below), whose sum is σ = 2772192. Its totient is φ = 2765532.

The previous prime is 2768819. The next prime is 2768863. The reversal of 2768861 is 1688672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2768861 - 2¹⁸ = 2506717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2768863) 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, 746 + ... + 2468.

It is an arithmetic number, because the mean of its divisors is an integer number (693048).

2^2768861 is an apocalyptic number.

It is an amenable number.

2768861 is a deficient number, since it is larger than the sum of its proper divisors (3331).

2768861 is a wasteful number, since it uses less digits than its factorization.

2768861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330.

The product of its digits is 32256, while the sum is 38.

The square root of 2768861 is about 1663.9894831398. The cubic root of 2768861 is about 140.4215356180.

The spelling of 2768861 in words is "two million, seven hundred sixty-eight thousand, eight hundred sixty-one".