2778359 has 4 divisors (see below), whose sum is σ = 2843016. Its totient is φ = 2713704.

The previous prime is 2778353. The next prime is 2778383. The reversal of 2778359 is 9538772.

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 2778359 - 2⁴ = 2778343 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 7³ + 7⁷ + 8³ + 3⁵ + 5⁹ + 9² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778353) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 32264 + ... + 32349.

It is an arithmetic number, because the mean of its divisors is an integer number (710754).

2^2778359 is an apocalyptic number.

2778359 is a deficient number, since it is larger than the sum of its proper divisors (64657).

2778359 is an equidigital number, since it uses as much as digits as its factorization.

2778359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64656.

The product of its digits is 105840, while the sum is 41.

The square root of 2778359 is about 1666.8410242132. The cubic root of 2778359 is about 140.5819146360.

The spelling of 2778359 in words is "two million, seven hundred seventy-eight thousand, three hundred fifty-nine".