12138830 has 32 divisors (see below), whose sum is σ = 23995008. Its totient is φ = 4384800.

The previous prime is 12138827. The next prime is 12138851. The reversal of 12138830 is 3883121.

It is a self number, because there is not a number n which added to its sum of digits gives 12138830.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22949 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (749844).

Almost surely, 2^12138830 is an apocalyptic number.

12138830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12138830 is a deficient number, since it is larger than the sum of its proper divisors (11856178).

12138830 is a wasteful number, since it uses less digits than its factorization.

12138830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12138830 is about 3484.0823756048. The cubic root of 12138830 is about 229.8223581066.

The spelling of 12138830 in words is "twelve million, one hundred thirty-eight thousand, eight hundred thirty".