12538028 has 12 divisors (see below), whose sum is σ = 22136520. Its totient is φ = 6213312.

The previous prime is 12538003. The next prime is 12538033. The reversal of 12538028 is 82083521.

It is a super-2 number, since 2×12538028² = 314404292257568, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 13418 + ... + 14321.

It is an arithmetic number, because the mean of its divisors is an integer number (1844710).

Almost surely, 2^12538028 is an apocalyptic number.

It is an amenable number.

12538028 is a deficient number, since it is larger than the sum of its proper divisors (9598492).

12538028 is a wasteful number, since it uses less digits than its factorization.

12538028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27856 (or 27854 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 12538028 is about 3540.9077932078. The cubic root of 12538028 is about 232.3145505426.

The spelling of 12538028 in words is "twelve million, five hundred thirty-eight thousand, twenty-eight".