2779838 has 4 divisors (see below), whose sum is σ = 4169760. Its totient is φ = 1389918.

The previous prime is 2779811. The next prime is 2779859. The reversal of 2779838 is 8389772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694958 + ... + 694961.

It is an arithmetic number, because the mean of its divisors is an integer number (1042440).

2^2779838 is an apocalyptic number.

2779838 is a deficient number, since it is larger than the sum of its proper divisors (1389922).

2779838 is a wasteful number, since it uses less digits than its factorization.

2779838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389921.

The product of its digits is 169344, while the sum is 44.

The square root of 2779838 is about 1667.2846187739. The cubic root of 2779838 is about 140.6068554697.

The spelling of 2779838 in words is "two million, seven hundred seventy-nine thousand, eight hundred thirty-eight".