12390028 has 12 divisors (see below), whose sum is σ = 24780112. Its totient is φ = 5310000.

The previous prime is 12390019. The next prime is 12390029. The reversal of 12390028 is 82009321.

12390028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

12390028 is an admirable number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12389984 and 12390011.

It is not an unprimeable number, because it can be changed into a prime (12390029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221223 + ... + 221278.

Almost surely, 2^12390028 is an apocalyptic number.

It is an amenable number.

12390028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12390028 is a wasteful number, since it uses less digits than its factorization.

12390028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442512 (or 442510 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12390028 is about 3519.9471586943. The cubic root of 12390028 is about 231.3968428933.

Adding to 12390028 its reverse (82009321), we get a palindrome (94399349).

The spelling of 12390028 in words is "twelve million, three hundred ninety thousand, twenty-eight".