12387740 has 24 divisors (see below), whose sum is σ = 26650512. Its totient is φ = 4833920.

The previous prime is 12387737. The next prime is 12387761. The reversal of 12387740 is 4778321.

It is a happy number.

12387740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12387740² = 306912204615200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12387697 and 12387706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6734 + ... + 8373.

It is an arithmetic number, because the mean of its divisors is an integer number (1110438).

Almost surely, 2^12387740 is an apocalyptic number.

12387740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12387740 is an abundant number, since it is smaller than the sum of its proper divisors (14262772).

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

12387740 is a wasteful number, since it uses less digits than its factorization.

12387740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15157 (or 15155 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 12387740 is about 3519.6221388098. The cubic root of 12387740 is about 231.3825984120.

The spelling of 12387740 in words is "twelve million, three hundred eighty-seven thousand, seven hundred forty".