2768981 has 4 divisors (see below), whose sum is σ = 2790912. Its totient is φ = 2747052.

The previous prime is 2768959. The next prime is 2768989. The reversal of 2768981 is 1898672.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2768981 is a prime.

It is a super-2 number, since 2×2768981² = 15334511556722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2768989) 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, 10775 + ... + 11028.

It is an arithmetic number, because the mean of its divisors is an integer number (697728).

2^2768981 is an apocalyptic number.

It is an amenable number.

2768981 is a deficient number, since it is larger than the sum of its proper divisors (21931).

2768981 is a wasteful number, since it uses less digits than its factorization.

2768981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21930.

The product of its digits is 48384, while the sum is 41.

The square root of 2768981 is about 1664.0255406694. The cubic root of 2768981 is about 140.4235641707.

The spelling of 2768981 in words is "two million, seven hundred sixty-eight thousand, nine hundred eighty-one".