28303012 has 12 divisors (see below), whose sum is σ = 49585536. Its totient is φ = 14135720.

The previous prime is 28303003. The next prime is 28303013. The reversal of 28303012 is 21030382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28303013) 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, 693 + ... + 7555.

It is an arithmetic number, because the mean of its divisors is an integer number (4132128).

Almost surely, 2^28303012 is an apocalyptic number.

It is an amenable number.

28303012 is a deficient number, since it is larger than the sum of its proper divisors (21282524).

28303012 is a wasteful number, since it uses less digits than its factorization.

28303012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7898 (or 7896 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 28303012 is about 5320.0575184861. The cubic root of 28303012 is about 304.7503538110.

Adding to 28303012 its reverse (21030382), we get a palindrome (49333394).

The spelling of 28303012 in words is "twenty-eight million, three hundred three thousand, twelve".