2278 has 8 divisors (see below), whose sum is σ = 3672. Its totient is φ = 1056.
The previous prime is 2273. The next prime is 2281. The reversal of 2278 is 8722.
2278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
2278 is a nontrivial binomial coefficient, being equal to C(68, 2).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a plaindrome in base 10 and base 12.
It is a nialpdrome in base 7 and base 9.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2273) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 67.
It is an arithmetic number, because the mean of its divisors is an integer number (459).
22278 is an apocalyptic number.
2278 is the 67-th triangular number and also the 34-th hexagonal number.
2278 is the 23-rd centered nonagonal number.
2278 is a deficient number, since it is larger than the sum of its proper divisors (1394).
2278 is a wasteful number, since it uses less digits than its factorization.
2278 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 86.
The product of its digits is 224, while the sum is 19.
The square root of 2278 is about 47.7283982551. The cubic root of 2278 is about 13.1578391577.
It can be divided in two parts, 22 and 78, that added together give a square (100 = 102).
The spelling of 2278 in words is "two thousand, two hundred seventy-eight".
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