3890 has 8 divisors (see below), whose sum is σ = 7020.
Its totient is φ = 1552.
The previous prime is 3889. The next prime is 3907. The reversal of 3890 is 983.
It can be divided in two parts, 38 and 90, that added together give a 7-th power (128 = 27).
3890 = 352 + 362 + 372.
It can be written as a sum of positive squares in 2 ways, for example, as 3721 + 169 = 61^2 + 13^2
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 14 and base 15.
It is a nialpdrome in base 16.
It is an unprimeable number.
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 3 ways as a sum of consecutive naturals, for example, 185 + ... + 204.
23890 is an apocalyptic number.
3890 is a deficient number, since it is larger than the sum of its proper divisors (3130).
3890 is a wasteful number, since it uses less digits than its factorization.
3890 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 396.
The product of its (nonzero) digits is 216, while the sum is 20.
The square root of 3890 is about 62.3698645181.
The cubic root of 3890 is about 15.7271441391.
The spelling of 3890 in words is "three thousand, eight hundred ninety".