2779858 has 8 divisors (see below), whose sum is σ = 4177152. Its totient is φ = 1387476.

The previous prime is 2779811. The next prime is 2779859. The reversal of 2779858 is 8589772.

2779858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×2779858² = 15455221000328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2779859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991 + ... + 2557.

It is an arithmetic number, because the mean of its divisors is an integer number (522144).

2^2779858 is an apocalyptic number.

2779858 is a deficient number, since it is larger than the sum of its proper divisors (1397294).

2779858 is a wasteful number, since it uses less digits than its factorization.

2779858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456.

The product of its digits is 282240, while the sum is 46.

The square root of 2779858 is about 1667.2906165393. The cubic root of 2779858 is about 140.6071926752.

The spelling of 2779858 in words is "two million, seven hundred seventy-nine thousand, eight hundred fifty-eight".