12918444 has 144 divisors (see below), whose sum is σ = 40040448. Its totient is φ = 3168000.

The previous prime is 12918443. The next prime is 12918457. The reversal of 12918444 is 44481921.

12918444 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12918444² = 333772390762272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12918443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315064 + ... + 315104.

Almost surely, 2^12918444 is an apocalyptic number.

12918444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12918444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20020224).

12918444 is an abundant number, since it is smaller than the sum of its proper divisors (27122004).

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

12918444 is a wasteful number, since it uses less digits than its factorization.

12918444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 95 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 12918444 is about 3594.2236992152. The cubic root of 12918444 is about 234.6407306405.

The spelling of 12918444 in words is "twelve million, nine hundred eighteen thousand, four hundred forty-four".