28080012 has 12 divisors (see below), whose sum is σ = 65520056. Its totient is φ = 9360000.

The previous prime is 28080007. The next prime is 28080023. The reversal of 28080012 is 21008082.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169989 + ... + 1170012.

Almost surely, 2^28080012 is an apocalyptic number.

It is an amenable number.

28080012 is an abundant number, since it is smaller than the sum of its proper divisors (37440044).

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

28080012 is a wasteful number, since it uses less digits than its factorization.

28080012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340008 (or 2340006 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28080012 is about 5299.0576520736. The cubic root of 28080012 is about 303.9478644435.

Adding to 28080012 its reverse (21008082), we get a palindrome (49088094).

The spelling of 28080012 in words is "twenty-eight million, eighty thousand, twelve".