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9988487 = 474612
BaseRepresentation
bin100110000110…
…100110000111
3200210110121222
4212012212013
510024112422
6554030555
7150620645
oct46064607
920713558
109988487
115702553
12341845b
1320b9562
141480195
15d24842
hex986987

9988487 has 6 divisors (see below), whose sum is σ = 10223184. Its totient is φ = 9754760.

The previous prime is 9988481. The next prime is 9988519. The reversal of 9988487 is 7848899.

It is not a de Polignac number, because 9988487 - 214 = 9972103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21437 + ... + 21897.

It is an arithmetic number, because the mean of its divisors is an integer number (1703864).

Almost surely, 29988487 is an apocalyptic number.

9988487 is a deficient number, since it is larger than the sum of its proper divisors (234697).

9988487 is an frugal number, since it uses more digits than its factorization.

9988487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 508 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 9988487 is about 3160.4567707849. The cubic root of 9988487 is about 215.3607572311.

The spelling of 9988487 in words is "nine million, nine hundred eighty-eight thousand, four hundred eighty-seven".

Divisors: 1 47 461 21667 212521 9988487