2799778 has 16 divisors (see below), whose sum is σ = 4359096. Its totient is φ = 1347840.

The previous prime is 2799757. The next prime is 2799779. The reversal of 2799778 is 8779972.

It can be written as a sum of positive squares in 4 ways, for example, as 1352569 + 1447209 = 1163^2 + 1203^2 .

It is not an unprimeable number, because it can be changed into a prime (2799779) 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, 6250 + ... + 6682.

2^2799778 is an apocalyptic number.

2799778 is a deficient number, since it is larger than the sum of its proper divisors (1559318).

2799778 is a wasteful number, since it uses less digits than its factorization.

2799778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

The product of its digits is 444528, while the sum is 49.

The square root of 2799778 is about 1673.2537165654. The cubic root of 2799778 is about 140.9422495421.

The spelling of 2799778 in words is "two million, seven hundred ninety-nine thousand, seven hundred seventy-eight".