12887390 has 16 divisors (see below), whose sum is σ = 23339232. Its totient is φ = 5123424.

The previous prime is 12887389. The next prime is 12887417. The reversal of 12887390 is 9378821.

12887390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 2189 + ... + 5528.

It is an arithmetic number, because the mean of its divisors is an integer number (1458702).

Almost surely, 2^12887390 is an apocalyptic number.

12887390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12887390 is a deficient number, since it is larger than the sum of its proper divisors (10451842).

12887390 is a wasteful number, since it uses less digits than its factorization.

12887390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7891.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 12887390 is about 3589.9011128442. The cubic root of 12887390 is about 234.4525660897.

The spelling of 12887390 in words is "twelve million, eight hundred eighty-seven thousand, three hundred ninety".