2778759 has 16 divisors (see below), whose sum is σ = 4163040. Its totient is φ = 1831680.

The previous prime is 2778739. The next prime is 2778779. The reversal of 2778759 is 9578772.

2778759 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2778739) and next prime (2778779).

It is not a de Polignac number, because 2778759 - 2¹⁶ = 2713223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778739) 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 15 ways as a sum of consecutive naturals, for example, 2089 + ... + 3149.

It is an arithmetic number, because the mean of its divisors is an integer number (260190).

2^2778759 is an apocalyptic number.

2778759 is a deficient number, since it is larger than the sum of its proper divisors (1384281).

2778759 is a wasteful number, since it uses less digits than its factorization.

2778759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1161 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The square root of 2778759 is about 1666.9610073424. The cubic root of 2778759 is about 140.5886608326.

The spelling of 2778759 in words is "two million, seven hundred seventy-eight thousand, seven hundred fifty-nine".