2868509 has 8 divisors (see below), whose sum is σ = 3345600. Its totient is φ = 2458428.

The previous prime is 2868497. The next prime is 2868511. The reversal of 2868509 is 9058682.

It is not a de Polignac number, because 2868509 - 2⁴ = 2868493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868539) 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, 3839 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (418200).

2^2868509 is an apocalyptic number.

It is an amenable number.

2868509 is a deficient number, since it is larger than the sum of its proper divisors (477091).

2868509 is an frugal number, since it uses more digits than its factorization.

2868509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8384 (or 8370 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 2868509 is about 1693.6673227054. The cubic root of 2868509 is about 142.0862565271.

The spelling of 2868509 in words is "two million, eight hundred sixty-eight thousand, five hundred nine".