12163640 has 16 divisors (see below), whose sum is σ = 27368280. Its totient is φ = 4865440.

The previous prime is 12163621. The next prime is 12163661. The reversal of 12163640 is 4636121.

It is a happy number.

12163640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152006 + ... + 152085.

Almost surely, 2^12163640 is an apocalyptic number.

12163640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12163640 is an abundant number, since it is smaller than the sum of its proper divisors (15204640).

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

12163640 is a wasteful number, since it uses less digits than its factorization.

12163640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304102 (or 304098 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12163640 is about 3487.6410365747. The cubic root of 12163640 is about 229.9788260281.

Adding to 12163640 its reverse (4636121), we get a palindrome (16799761).

The spelling of 12163640 in words is "twelve million, one hundred sixty-three thousand, six hundred forty".