12999378 has 32 divisors (see below), whose sum is σ = 30441600. Its totient is φ = 3623040.

The previous prime is 12999367. The next prime is 12999379. The reversal of 12999378 is 87399921.

12999378 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 not an unprimeable number, because it can be changed into a prime (12999379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2053 + ... + 5496.

It is an arithmetic number, because the mean of its divisors is an integer number (951300).

Almost surely, 2^12999378 is an apocalyptic number.

12999378 is an abundant number, since it is smaller than the sum of its proper divisors (17442222).

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

12999378 is a wasteful number, since it uses less digits than its factorization.

12999378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7602.

The product of its digits is 244944, while the sum is 48.

The square root of 12999378 is about 3605.4650185517. The cubic root of 12999378 is about 235.1297186349.

The spelling of 12999378 in words is "twelve million, nine hundred ninety-nine thousand, three hundred seventy-eight".