2800399 has 12 divisors (see below), whose sum is σ = 3310104. Its totient is φ = 2361744.

The previous prime is 2800397. The next prime is 2800403. The reversal of 2800399 is 9930082.

It is a happy number.

It is not a de Polignac number, because 2800399 - 2¹ = 2800397 is a prime.

2800399 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2800399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2800397) 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 11 ways as a sum of consecutive naturals, for example, 2857 + ... + 3709.

It is an arithmetic number, because the mean of its divisors is an integer number (275842).

2^2800399 is an apocalyptic number.

2800399 is a deficient number, since it is larger than the sum of its proper divisors (509705).

2800399 is an equidigital number, since it uses as much as digits as its factorization.

2800399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2800399 is about 1673.4392728749. The cubic root of 2800399 is about 140.9526692571.

The spelling of 2800399 in words is "two million, eight hundred thousand, three hundred ninety-nine".