985770 has 40 divisors (see below), whose sum is σ = 2652804. Its totient is φ = 262656.

The previous prime is 985759. The next prime is 985781. The reversal of 985770 is 77589.

985770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (985759) and next prime (985781).

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 23409 = 981^2 + 153^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 202 + ... + 1418.

2⁹⁸⁵⁷⁷⁰ is an apocalyptic number.

985770 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 985770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326402).

985770 is an abundant number, since it is smaller than the sum of its proper divisors (1667034).

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

985770 is a wasteful number, since it uses less digits than its factorization.

985770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 985770 is about 992.8595066776. The cubic root of 985770 is about 99.5233987882.

The spelling of 985770 in words is "nine hundred eighty-five thousand, seven hundred seventy".