12390918 has 8 divisors (see below), whose sum is σ = 24781848. Its totient is φ = 4130304.

The previous prime is 12390887. The next prime is 12390919. The reversal of 12390918 is 81909321.

It is a sphenic number, since it is the product of 3 distinct primes.

12390918 is an admirable number.

It is a super-4 number, since 4×12390918⁴ (a number of 29 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032571 + ... + 1032582.

It is an arithmetic number, because the mean of its divisors is an integer number (3097731).

Almost surely, 2^12390918 is an apocalyptic number.

12390918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12390918 is a wasteful number, since it uses less digits than its factorization.

12390918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065158.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12390918 is about 3520.0735787764. The cubic root of 12390918 is about 231.4023833236.

The spelling of 12390918 in words is "twelve million, three hundred ninety thousand, nine hundred eighteen".