12918240 has 72 divisors (see below), whose sum is σ = 44088408. Its totient is φ = 3444480.

The previous prime is 12918229. The next prime is 12918259. The reversal of 12918240 is 4281921.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3046 + ... + 5925.

It is an arithmetic number, because the mean of its divisors is an integer number (612339).

Almost surely, 2^12918240 is an apocalyptic number.

12918240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12918240 is an abundant number, since it is smaller than the sum of its proper divisors (31170168).

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

12918240 is a wasteful number, since it uses less digits than its factorization.

12918240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8992 (or 8981 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12918240 is about 3594.1953202351. The cubic root of 12918240 is about 234.6394955341.

The spelling of 12918240 in words is "twelve million, nine hundred eighteen thousand, two hundred forty".