2878155 has 24 divisors (see below), whose sum is σ = 5702112. Its totient is φ = 1315584.

The previous prime is 2878153. The next prime is 2878181. The reversal of 2878155 is 5518782.

It is not a de Polignac number, because 2878155 - 2¹ = 2878153 is a prime.

2878155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2878153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4254 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (237588).

2^2878155 is an apocalyptic number.

2878155 is a deficient number, since it is larger than the sum of its proper divisors (2823957).

2878155 is a wasteful number, since it uses less digits than its factorization.

2878155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155 (or 9152 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 2878155 is about 1696.5125994227. The cubic root of 2878155 is about 142.2453438925.

The spelling of 2878155 in words is "two million, eight hundred seventy-eight thousand, one hundred fifty-five".