985590 has 48 divisors (see below), whose sum is σ = 2628288. Its totient is φ = 256128.

The previous prime is 985571. The next prime is 985597. The reversal of 985590 is 95589.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985597) by changing a digit.

985590 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4114 + ... + 4346.

It is an arithmetic number, because the mean of its divisors is an integer number (54756).

2⁹⁸⁵⁵⁹⁰ is an apocalyptic number.

985590 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 985590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1314144).

985590 is an abundant number, since it is smaller than the sum of its proper divisors (1642698).

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

985590 is a wasteful number, since it uses less digits than its factorization.

985590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 985590 is about 992.7688552730. The cubic root of 985590 is about 99.5173408158.

The spelling of 985590 in words is "nine hundred eighty-five thousand, five hundred ninety".