985540 has 12 divisors (see below), whose sum is σ = 2069676. Its totient is φ = 394208.

The previous prime is 985531. The next prime is 985547. The reversal of 985540 is 45589.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 440896 = 738^2 + 664^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (985547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24619 + ... + 24658.

It is an arithmetic number, because the mean of its divisors is an integer number (172473).

2⁹⁸⁵⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

985540 is an abundant number, since it is smaller than the sum of its proper divisors (1084136).

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

985540 is a wasteful number, since it uses less digits than its factorization.

985540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49286 (or 49284 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 985540 is about 992.7436728582. The cubic root of 985540 is about 99.5156579148.

The spelling of 985540 in words is "nine hundred eighty-five thousand, five hundred forty".