1990086 has 32 divisors (see below), whose sum is σ = 4646400. Its totient is φ = 568008.

The previous prime is 1990081. The next prime is 1990103. The reversal of 1990086 is 6800991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (145200).

2^1990086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323200).

1990086 is an abundant number, since it is smaller than the sum of its proper divisors (2656314).

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

1990086 is an equidigital number, since it uses as much as digits as its factorization.

1990086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1990086 is about 1410.7040795291. The cubic root of 1990086 is about 125.7835790999.

The spelling of 1990086 in words is "one million, nine hundred ninety thousand, eighty-six".