86990000 has 50 divisors (see below), whose sum is σ = 210635700. Its totient is φ = 34792000.

The previous prime is 86989993. The next prime is 86990011. The reversal of 86990000 is 9968.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (50).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5651 + ... + 14349.

It is an arithmetic number, because the mean of its divisors is an integer number (4212714).

Almost surely, 2^86990000 is an apocalyptic number.

86990000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105317850).

86990000 is an abundant number, since it is smaller than the sum of its proper divisors (123645700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86990000 is an equidigital number, since it uses as much as digits as its factorization.

86990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8727 (or 8706 counting only the distinct ones).

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

The square root of 86990000 is about 9326.8429814166. The cubic root of 86990000 is about 443.0877843249.

Adding to 86990000 its reverse (9968), we get a palindrome (86999968).

The spelling of 86990000 in words is "eighty-six million, nine hundred ninety thousand".