12887994 has 16 divisors (see below), whose sum is σ = 29458368. Its totient is φ = 3682272.

The previous prime is 12887993. The next prime is 12888013. The reversal of 12887994 is 49978821.

It is a super-2 number, since 2×12887994² = 332200778688072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12887993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153387 + ... + 153470.

It is an arithmetic number, because the mean of its divisors is an integer number (1841148).

Almost surely, 2^12887994 is an apocalyptic number.

12887994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12887994 is an abundant number, since it is smaller than the sum of its proper divisors (16570374).

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

12887994 is a wasteful number, since it uses less digits than its factorization.

12887994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306869.

The product of its digits is 290304, while the sum is 48.

The square root of 12887994 is about 3589.9852367384. The cubic root of 12887994 is about 234.4562287692.

Subtracting from 12887994 its product of digits (290304), we obtain a triangular number (12597690 = T₅₀₁₉).

The spelling of 12887994 in words is "twelve million, eight hundred eighty-seven thousand, nine hundred ninety-four".