9988287 has 8 divisors (see below), whose sum is σ = 13543680. Its totient is φ = 6545880.

The previous prime is 9988283. The next prime is 9988291. The reversal of 9988287 is 7828899.

It is an interprime number because it is at equal distance from previous prime (9988283) and next prime (9988291).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9988287 - 2² = 9988283 is a prime.

9988287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28039 + ... + 28392.

It is an arithmetic number, because the mean of its divisors is an integer number (1692960).

Almost surely, 2^9988287 is an apocalyptic number.

9988287 is a deficient number, since it is larger than the sum of its proper divisors (3555393).

9988287 is a wasteful number, since it uses less digits than its factorization.

9988287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56493.

The product of its digits is 580608, while the sum is 51.

The square root of 9988287 is about 3160.4251296305. The cubic root of 9988287 is about 215.3593198282.

The spelling of 9988287 in words is "nine million, nine hundred eighty-eight thousand, two hundred eighty-seven".