12390740 has 12 divisors (see below), whose sum is σ = 26020596. Its totient is φ = 4956288.

The previous prime is 12390737. The next prime is 12390757. The reversal of 12390740 is 4709321.

It can be written as a sum of positive squares in 2 ways, for example, as 5692996 + 6697744 = 2386^2 + 2588^2 .

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 3 ways as a sum of consecutive naturals, for example, 309749 + ... + 309788.

It is an arithmetic number, because the mean of its divisors is an integer number (2168383).

Almost surely, 2^12390740 is an apocalyptic number.

12390740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12390740 is an abundant number, since it is smaller than the sum of its proper divisors (13629856).

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

12390740 is a wasteful number, since it uses less digits than its factorization.

12390740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619546 (or 619544 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12390740 is about 3520.0482951232. The cubic root of 12390740 is about 231.4012752588.

The spelling of 12390740 in words is "twelve million, three hundred ninety thousand, seven hundred forty".