9163638 has 32 divisors (see below), whose sum is σ = 22216320. Its totient is φ = 2776680.

The previous prime is 9163633. The next prime is 9163639. The reversal of 9163638 is 8363619.

It is a happy number.

9163638 is a `hidden beast` number, since 9 + 16 + 3 + 638 = 666.

It is a super-2 number, since 2×9163638² = 167944522790088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9163633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7120 + ... + 8307.

It is an arithmetic number, because the mean of its divisors is an integer number (694260).

Almost surely, 2^9163638 is an apocalyptic number.

9163638 is an abundant number, since it is smaller than the sum of its proper divisors (13052682).

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

9163638 is a wasteful number, since it uses less digits than its factorization.

9163638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449 (or 15443 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 9163638 is about 3027.1501449383. The cubic root of 9163638 is about 209.2614875311.

It can be divided in two parts, 9163 and 638, that added together give a square (9801 = 99²).

The spelling of 9163638 in words is "nine million, one hundred sixty-three thousand, six hundred thirty-eight".