9887540 has 48 divisors (see below), whose sum is σ = 23686992. Its totient is φ = 3434496.

The previous prime is 9887509. The next prime is 9887573. The reversal of 9887540 is 457889.

It can be written as a sum of positive squares in 8 ways, for example, as 15376 + 9872164 = 124^2 + 3142^2 .

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3302 + ... + 5538.

It is an arithmetic number, because the mean of its divisors is an integer number (493479).

Almost surely, 2^9887540 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 9887540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11843496).

9887540 is an abundant number, since it is smaller than the sum of its proper divisors (13799452).

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

9887540 is a wasteful number, since it uses less digits than its factorization.

9887540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 9887540 is about 3144.4458971335. The cubic root of 9887540 is about 214.6327966744.

The spelling of 9887540 in words is "nine million, eight hundred eighty-seven thousand, five hundred forty".