9985540 has 12 divisors (see below), whose sum is σ = 20969676. Its totient is φ = 3994208.

The previous prime is 9985501. The next prime is 9985553. The reversal of 9985540 is 455899.

It can be written as a sum of positive squares in 2 ways, for example, as 7650756 + 2334784 = 2766^2 + 1528^2 .

It is a super-2 number, since 2×9985540² = 199422018183200, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9985493 and 9985502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249619 + ... + 249658.

It is an arithmetic number, because the mean of its divisors is an integer number (1747473).

Almost surely, 2^9985540 is an apocalyptic number.

It is an amenable number.

9985540 is an abundant number, since it is smaller than the sum of its proper divisors (10984136).

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

9985540 is a wasteful number, since it uses less digits than its factorization.

9985540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499286 (or 499284 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 9985540 is about 3159.9905063149. The cubic root of 9985540 is about 215.3395751582.

The spelling of 9985540 in words is "nine million, nine hundred eighty-five thousand, five hundred forty".