28030012 has 6 divisors (see below), whose sum is σ = 49052528. Its totient is φ = 14015004.

The previous prime is 28030007. The next prime is 28030033. The reversal of 28030012 is 21003082.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3503748 + ... + 3503755.

Almost surely, 2^28030012 is an apocalyptic number.

It is an amenable number.

28030012 is a deficient number, since it is larger than the sum of its proper divisors (21022516).

28030012 is a wasteful number, since it uses less digits than its factorization.

28030012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007507 (or 7007505 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28030012 is about 5294.3377300660. The cubic root of 28030012 is about 303.7673514336.

Adding to 28030012 its reverse (21003082), we get a palindrome (49033094).

The spelling of 28030012 in words is "twenty-eight million, thirty thousand, twelve".