2778683 has 4 divisors (see below), whose sum is σ = 2804760. Its totient is φ = 2752608.

The previous prime is 2778673. The next prime is 2778689. The reversal of 2778683 is 3868772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778683 - 2⁶ = 2778619 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 7³ + 7⁶ + 8⁶ + 6⁷ + 8⁶ + 3¹³ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2778683.

It is not an unprimeable number, because it can be changed into a prime (2778689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12878 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (701190).

2^2778683 is an apocalyptic number.

2778683 is a deficient number, since it is larger than the sum of its proper divisors (26077).

2778683 is a wasteful number, since it uses less digits than its factorization.

2778683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26076.

The product of its digits is 112896, while the sum is 41.

The square root of 2778683 is about 1666.9382112124. The cubic root of 2778683 is about 140.5873791050.

The spelling of 2778683 in words is "two million, seven hundred seventy-eight thousand, six hundred eighty-three".