2878855 has 16 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 1948320.

The previous prime is 2878853. The next prime is 2878867. The reversal of 2878855 is 5588782.

It is not a de Polignac number, because 2878855 - 2¹ = 2878853 is a prime.

It is a super-2 number, since 2×2878855² = 16575612222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410 + ... + 3400.

It is an arithmetic number, because the mean of its divisors is an integer number (249984).

2^2878855 is an apocalyptic number.

2878855 is a deficient number, since it is larger than the sum of its proper divisors (1120889).

2878855 is an equidigital number, since it uses as much as digits as its factorization.

2878855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 179200, while the sum is 43.

The square root of 2878855 is about 1696.7188924510. The cubic root of 2878855 is about 142.2568748524.

It can be divided in two parts, 287 and 8855, that multiplied together give a triangular number (2541385 = T₂₂₅₄).

The spelling of 2878855 in words is "two million, eight hundred seventy-eight thousand, eight hundred fifty-five".