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2878 = 21439
BaseRepresentation
bin101100111110
310221121
4230332
543003
621154
711251
oct5476
93847
102878
112187
1217ba
131405
141098
15cbd
hexb3e

2878 has 4 divisors (see below), whose sum is σ = 4320. Its totient is φ = 1438.

The previous prime is 2861. The next prime is 2879. The reversal of 2878 is 8782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8782 = 24391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (1080).

22878 is an apocalyptic number.

2878 is a deficient number, since it is larger than the sum of its proper divisors (1442).

2878 is a wasteful number, since it uses less digits than its factorization.

2878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its digits is 896, while the sum is 25.

The square root of 2878 is about 53.6469943240. The cubic root of 2878 is about 14.2242790356.

The spelling of 2878 in words is "two thousand, eight hundred seventy-eight".

Divisors: 1 2 1439 2878