2815879 has 4 divisors (see below), whose sum is σ = 3071880. Its totient is φ = 2559880.

The previous prime is 2815877. The next prime is 2815889. The reversal of 2815879 is 9785182.

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 2815879 - 2¹ = 2815877 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2815879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815877) 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, 127984 + ... + 128005.

It is an arithmetic number, because the mean of its divisors is an integer number (767970).

2^2815879 is an apocalyptic number.

2815879 is a deficient number, since it is larger than the sum of its proper divisors (256001).

2815879 is a wasteful number, since it uses less digits than its factorization.

2815879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256000.

The product of its digits is 40320, while the sum is 40.

The square root of 2815879 is about 1678.0581038808. The cubic root of 2815879 is about 141.2119107887.

The spelling of 2815879 in words is "two million, eight hundred fifteen thousand, eight hundred seventy-nine".