28027512 has 32 divisors (see below), whose sum is σ = 77854800. Its totient is φ = 9342432.

The previous prime is 28027511. The next prime is 28027561. The reversal of 28027512 is 21572082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28027511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64663 + ... + 65094.

Almost surely, 2^28027512 is an apocalyptic number.

It is an amenable number.

28027512 is an abundant number, since it is smaller than the sum of its proper divisors (49827288).

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

28027512 is a wasteful number, since it uses less digits than its factorization.

28027512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129772 (or 129762 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28027512 is about 5294.1016235052. The cubic root of 28027512 is about 303.7583201501.

Adding to 28027512 its reverse (21572082), we get a palindrome (49599594).

The spelling of 28027512 in words is "twenty-eight million, twenty-seven thousand, five hundred twelve".