12618840 has 64 divisors (see below), whose sum is σ = 40773600. Its totient is φ = 3105792.

The previous prime is 12618817. The next prime is 12618841. The reversal of 12618840 is 4881621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12618798 and 12618807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12618841) 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, 2485 + ... + 5604.

Almost surely, 2^12618840 is an apocalyptic number.

12618840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12618840 is an abundant number, since it is smaller than the sum of its proper divisors (28154760).

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

12618840 is a wasteful number, since it uses less digits than its factorization.

12618840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116 (or 8112 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 12618840 is about 3552.3006629507. The cubic root of 12618840 is about 232.8125983664.

It can be divided in two parts, 1261 and 8840, that added together give a palindrome (10101).

The spelling of 12618840 in words is "twelve million, six hundred eighteen thousand, eight hundred forty".