2778694 has 4 divisors (see below), whose sum is σ = 4168044. Its totient is φ = 1389346.

The previous prime is 2778689. The next prime is 2778697. The reversal of 2778694 is 4968772.

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

It is a super-2 number, since 2×2778694² = 15442280691272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2778694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694672 + ... + 694675.

It is an arithmetic number, because the mean of its divisors is an integer number (1042011).

2^2778694 is an apocalyptic number.

2778694 is a deficient number, since it is larger than the sum of its proper divisors (1389350).

2778694 is a wasteful number, since it uses less digits than its factorization.

2778694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389349.

The product of its digits is 169344, while the sum is 43.

The square root of 2778694 is about 1666.9415106716. The cubic root of 2778694 is about 140.5875646197.

The spelling of 2778694 in words is "two million, seven hundred seventy-eight thousand, six hundred ninety-four".