9667638 has 12 divisors (see below), whose sum is σ = 20946588. Its totient is φ = 3222540.

The previous prime is 9667633. The next prime is 9667639. The reversal of 9667638 is 8367669.

9667638 is a `hidden beast` number, since 9 + 6 + 6 + 7 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9667593 and 9667602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9667633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268528 + ... + 268563.

It is an arithmetic number, because the mean of its divisors is an integer number (1745549).

Almost surely, 2^9667638 is an apocalyptic number.

9667638 is an abundant number, since it is smaller than the sum of its proper divisors (11278950).

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

9667638 is a wasteful number, since it uses less digits than its factorization.

9667638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537099 (or 537096 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 9667638 is about 3109.2825539021. The cubic root of 9667638 is about 213.0296857389.

The spelling of 9667638 in words is "nine million, six hundred sixty-seven thousand, six hundred thirty-eight".