12500028 has 24 divisors (see below), whose sum is σ = 32407760. Its totient is φ = 4166640.

The previous prime is 12500003. The next prime is 12500029. The reversal of 12500028 is 82000521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57763 + ... + 57978.

Almost surely, 2^12500028 is an apocalyptic number.

12500028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12500028 is an abundant number, since it is smaller than the sum of its proper divisors (19907732).

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

12500028 is a wasteful number, since it uses less digits than its factorization.

12500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115754 (or 115746 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 12500028 is about 3535.5378657285. The cubic root of 12500028 is about 232.0796149665.

Adding to 12500028 its reverse (82000521), we get a palindrome (94500549).

The spelling of 12500028 in words is "twelve million, five hundred thousand, twenty-eight".