83890 has 8 divisors (see below), whose sum is σ = 151020.
Its totient is φ = 33552.
The previous prime is 83873. The next prime is 83891. The reversal of 83890 is 9838.
It can be written as a sum of positive squares in 2 ways, for example, as 82369 + 1521 = 287^2 + 39^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between even and odd.
It is not an unprimeable number, because it can be changed into a prime (83891) 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, 4185 + ... + 4204.
283890 is an apocalyptic number.
83890 is a deficient number, since it is larger than the sum of its proper divisors (67130).
83890 is a wasteful number, since it uses less digits than its factorization.
83890 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8396.
The product of its (nonzero) digits is 1728, while the sum is 28.
The square root of 83890 is about 289.6377047278.
The cubic root of 83890 is about 43.7760660995.
The spelling of 83890 in words is "eighty-three thousand, eight hundred ninety".