2768821 has 8 divisors (see below), whose sum is σ = 3102624. Its totient is φ = 2448720.

The previous prime is 2768819. The next prime is 2768863. The reversal of 2768821 is 1288672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2768821 - 2¹ = 2768819 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 (2765821) 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, 2995 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (387828).

2^2768821 is an apocalyptic number.

It is an amenable number.

2768821 is a deficient number, since it is larger than the sum of its proper divisors (333803).

2768821 is a wasteful number, since it uses less digits than its factorization.

2768821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851.

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

The square root of 2768821 is about 1663.9774637897. The cubic root of 2768821 is about 140.4208594208.

The spelling of 2768821 in words is "two million, seven hundred sixty-eight thousand, eight hundred twenty-one".