Search a number
2870 = 25741
BaseRepresentation
bin101100110110
310221022
4230312
542440
621142
711240
oct5466
93838
102870
11217a
1217b2
1313ca
141090
15cb5
hexb36

2870 has 16 divisors (see below), whose sum is σ = 6048. Its totient is φ = 960.

The previous prime is 2861. The next prime is 2879. The reversal of 2870 is 782.

2870 = 12 + 22 + ... + 202.

It is an interprime number because it is at equal distance from previous prime (2861) and next prime (2879).

2870 is an undulating number in base 9.

It is a Curzon number.

It is a nialpdrome in base 15.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50 + ... + 90.

It is an arithmetic number, because the mean of its divisors is an integer number (378).

22870 is an apocalyptic number.

2870 is an abundant number, since it is smaller than the sum of its proper divisors (3178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3024).

2870 is a wasteful number, since it uses less digits than its factorization.

2870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2870 is about 53.5723809439. The cubic root of 2870 is about 14.2110870233.

The spelling of 2870 in words is "two thousand, eight hundred seventy".

Divisors: 1 2 5 7 10 14 35 41 70 82 205 287 410 574 1435 2870