9888638 has 4 divisors (see below), whose sum is σ = 14832960. Its totient is φ = 4944318.

The previous prime is 9888631. The next prime is 9888661. The reversal of 9888638 is 8368889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8368889 = 907 ⋅9227.

It is a super-2 number, since 2×9888638² = 195570322990088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472158 + ... + 2472161.

It is an arithmetic number, because the mean of its divisors is an integer number (3708240).

Almost surely, 2^9888638 is an apocalyptic number.

9888638 is a deficient number, since it is larger than the sum of its proper divisors (4944322).

9888638 is a wasteful number, since it uses less digits than its factorization.

9888638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944321.

The product of its digits is 663552, while the sum is 50.

The square root of 9888638 is about 3144.6204858456. The cubic root of 9888638 is about 214.6407412891.

The spelling of 9888638 in words is "nine million, eight hundred eighty-eight thousand, six hundred thirty-eight".