2768778 has 24 divisors (see below), whose sum is σ = 6037668. Its totient is φ = 916992.

The previous prime is 2768767. The next prime is 2768783. The reversal of 2768778 is 8778672.

It can be written as a sum of positive squares in 2 ways, for example, as 2712609 + 56169 = 1647^2 + 237^2 .

It is a super-2 number, since 2×2768778² = 15332263226568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3076 + ... + 3872.

2^2768778 is an apocalyptic number.

2768778 is an abundant number, since it is smaller than the sum of its proper divisors (3268890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2768778 is a wasteful number, since it uses less digits than its factorization.

2768778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 995 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 2768778 is about 1663.9645428915. The cubic root of 2768778 is about 140.4201325015.

The spelling of 2768778 in words is "two million, seven hundred sixty-eight thousand, seven hundred seventy-eight".