985660 has 48 divisors (see below), whose sum is σ = 2370816. Its totient is φ = 340992.

The previous prime is 985657. The next prime is 985667. The reversal of 985660 is 66589.

985660 = T₂₅ + T₂₆ + ... + T₁₈₀.

985660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4309 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (49392).

2⁹⁸⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185408).

985660 is an abundant number, since it is smaller than the sum of its proper divisors (1385156).

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

985660 is a wasteful number, since it uses less digits than its factorization.

985660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 985660 is about 992.8041095805. The cubic root of 985660 is about 99.5196967816.

The spelling of 985660 in words is "nine hundred eighty-five thousand, six hundred sixty".