2878279 has 4 divisors (see below), whose sum is σ = 2977560. Its totient is φ = 2779000.

The previous prime is 2878247. The next prime is 2878297. The reversal of 2878279 is 9728782.

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 2878279 - 2⁵ = 2878247 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 (2878229) 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, 49597 + ... + 49654.

It is an arithmetic number, because the mean of its divisors is an integer number (744390).

2^2878279 is an apocalyptic number.

2878279 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2878279 is a deficient number, since it is larger than the sum of its proper divisors (99281).

2878279 is an equidigital number, since it uses as much as digits as its factorization.

2878279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99280.

The product of its digits is 112896, while the sum is 43.

The square root of 2878279 is about 1696.5491445873. The cubic root of 2878279 is about 142.2473866560.

It can be divided in two parts, 28782 and 79, that multiplied together give a triangular number (2273778 = T₂₁₃₂).

The spelling of 2878279 in words is "two million, eight hundred seventy-eight thousand, two hundred seventy-nine".