28027012 has 24 divisors (see below), whose sum is σ = 53172056. Its totient is φ = 12849408.

The previous prime is 28027003. The next prime is 28027031. The reversal of 28027012 is 21072082.

It can be written as a sum of positive squares in 4 ways, for example, as 576 + 28026436 = 24^2 + 5294^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6448 + ... + 9880.

Almost surely, 2^28027012 is an apocalyptic number.

It is an amenable number.

28027012 is a deficient number, since it is larger than the sum of its proper divisors (25145044).

28027012 is a wasteful number, since it uses less digits than its factorization.

28027012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607 (or 3605 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 28027012 is about 5294.0544009294. The cubic root of 28027012 is about 303.7565138289.

Adding to 28027012 its reverse (21072082), we get a palindrome (49099094).

The spelling of 28027012 in words is "twenty-eight million, twenty-seven thousand, twelve".