2866406399 has 4 divisors (see below), whose sum is σ = 2866835280. Its totient is φ = 2865977520.

The previous prime is 2866406321. The next prime is 2866406461. The reversal of 2866406399 is 9936046682.

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 2866406399 - 2¹² = 2866402303 is a prime.

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 2866406399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2866406999) 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, 204254 + ... + 217835.

It is an arithmetic number, because the mean of its divisors is an integer number (716708820).

Almost surely, 2^2866406399 is an apocalyptic number.

2866406399 is a deficient number, since it is larger than the sum of its proper divisors (428881).

2866406399 is an equidigital number, since it uses as much as digits as its factorization.

2866406399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428880.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The square root of 2866406399 is about 53538.8307586186. The cubic root of 2866406399 is about 1420.5153189851.

The spelling of 2866406399 in words is "two billion, eight hundred sixty-six million, four hundred six thousand, three hundred ninety-nine".