7870 has 8 divisors (see below), whose sum is σ = 14184.
Its totient is φ = 3144.
The previous prime is 7867. The next prime is 7873. The reversal of 7870 is 787.
It can be divided in two parts, 78 and 70, that multiplied together give a triangular number (5460 = T104).
It is an interprime number because it is at equal distance from previous prime (7867) and next prime (7873).
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (7873) 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, 384 + ... + 403.
It is an arithmetic number, because the mean of its divisors is an integer number (1773).
27870 is an apocalyptic number.
7870 is a deficient number, since it is larger than the sum of its proper divisors (6314).
7870 is a wasteful number, since it uses less digits than its factorization.
7870 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 794.
The product of its (nonzero) digits is 392, while the sum is 22.
The square root of 7870 is about 88.7130204649.
The cubic root of 7870 is about 19.8910745055.
The spelling of 7870 in words is "seven thousand, eight hundred seventy".