2780799 has 12 divisors (see below), whose sum is σ = 4313304. Its totient is φ = 1588944.

The previous prime is 2780797. The next prime is 2780801. The reversal of 2780799 is 9970872.

It is an interprime number because it is at equal distance from previous prime (2780797) and next prime (2780801).

It is not a de Polignac number, because 2780799 - 2¹ = 2780797 is a prime.

2780799 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2780799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9312 + ... + 9605.

It is an arithmetic number, because the mean of its divisors is an integer number (359442).

2^2780799 is an apocalyptic number.

2780799 is a deficient number, since it is larger than the sum of its proper divisors (1532505).

2780799 is a wasteful number, since it uses less digits than its factorization.

2780799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18934 (or 18927 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 2780799 is about 1667.5727870171. The cubic root of 2780799 is about 140.6230563682.

The spelling of 2780799 in words is "two million, seven hundred eighty thousand, seven hundred ninety-nine".