2864859 has 8 divisors (see below), whose sum is σ = 3835392. Its totient is φ = 1902120.

The previous prime is 2864843. The next prime is 2864867. The reversal of 2864859 is 9584682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2864859 - 2⁴ = 2864843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2864859.

It is not an unprimeable number, because it can be changed into a prime (2864879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027 + ... + 2604.

It is an arithmetic number, because the mean of its divisors is an integer number (479424).

2^2864859 is an apocalyptic number.

2864859 is a deficient number, since it is larger than the sum of its proper divisors (970533).

2864859 is a wasteful number, since it uses less digits than its factorization.

2864859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897.

The product of its digits is 138240, while the sum is 42.

The square root of 2864859 is about 1692.5894363371. The cubic root of 2864859 is about 142.0259656280.

The spelling of 2864859 in words is "two million, eight hundred sixty-four thousand, eight hundred fifty-nine".