86990 has 8 divisors (see below), whose sum is σ = 156600. Its totient is φ = 34792.

The previous prime is 86981. The next prime is 86993. The reversal of 86990 is 9968.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86993) 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, 4340 + ... + 4359.

It is an arithmetic number, because the mean of its divisors is an integer number (19575).

2⁸⁶⁹⁹⁰ is an apocalyptic number.

86990 is a deficient number, since it is larger than the sum of its proper divisors (69610).

86990 is a wasteful number, since it uses less digits than its factorization.

86990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8706.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 86990 is about 294.9406720003. The cubic root of 86990 is about 44.3087784325.

It can be divided in two parts, 869 and 90, that multiplied together give a triangular number (78210 = T₃₉₅).

The spelling of 86990 in words is "eighty-six thousand, nine hundred ninety".