12390858 has 24 divisors (see below), whose sum is σ = 28426788. Its totient is φ = 3887232.

The previous prime is 12390853. The next prime is 12390863. The reversal of 12390858 is 85809321.

12390858 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 an interprime number because it is at equal distance from previous prime (12390853) and next prime (12390863).

It can be written as a sum of positive squares in 2 ways, for example, as 12299049 + 91809 = 3507^2 + 303^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12390853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19941 + ... + 20552.

Almost surely, 2^12390858 is an apocalyptic number.

12390858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12390858 is an abundant number, since it is smaller than the sum of its proper divisors (16035930).

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

12390858 is a wasteful number, since it uses less digits than its factorization.

12390858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40518 (or 40515 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 12390858 is about 3520.0650562170. The cubic root of 12390858 is about 231.4020098198.

The spelling of 12390858 in words is "twelve million, three hundred ninety thousand, eight hundred fifty-eight".