12640104 has 64 divisors (see below), whose sum is σ = 35448000. Its totient is φ = 4173120.

The previous prime is 12640099. The next prime is 12640123. The reversal of 12640104 is 40104621.

12640104 is a `hidden beast` number, since 12 + 640 + 10 + 4 = 666.

12640104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29814 + ... + 30234.

It is an arithmetic number, because the mean of its divisors is an integer number (553875).

Almost surely, 2^12640104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12640104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17724000).

12640104 is an abundant number, since it is smaller than the sum of its proper divisors (22807896).

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

12640104 is a wasteful number, since it uses less digits than its factorization.

12640104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12640104 is about 3555.2923930389. The cubic root of 12640104 is about 232.9432957729.

Adding to 12640104 its reverse (40104621), we get a palindrome (52744725).

The spelling of 12640104 in words is "twelve million, six hundred forty thousand, one hundred four".