2858 has 4 divisors (see below), whose sum is σ = 4290. Its totient is φ = 1428.

The previous prime is 2857. The next prime is 2861. The reversal of 2858 is 8582.

2858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2809 + 49 = 53^2 + 7^2 .

It is a Curzon number.

It is a plaindrome in base 7 and base 13.

It is a nialpdrome in base 15.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (2851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713 + ... + 716.

2²⁸⁵⁸ is an apocalyptic number.

2858 is a deficient number, since it is larger than the sum of its proper divisors (1432).

2858 is a wasteful number, since it uses less digits than its factorization.

2858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its digits is 640, while the sum is 23.

The square root of 2858 is about 53.4602656185. The cubic root of 2858 is about 14.1912529612.

The spelling of 2858 in words is "two thousand, eight hundred fifty-eight".