28278512 has 10 divisors (see below), whose sum is σ = 54789648. Its totient is φ = 14139248.

The previous prime is 28278499. The next prime is 28278527. The reversal of 28278512 is 21587282.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 883688 + ... + 883719.

Almost surely, 2^28278512 is an apocalyptic number.

It is an amenable number.

28278512 is a deficient number, since it is larger than the sum of its proper divisors (26511136).

28278512 is a wasteful number, since it uses less digits than its factorization.

28278512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767415 (or 1767409 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 28278512 is about 5317.7544132839. The cubic root of 28278512 is about 304.6623945144.

The spelling of 28278512 in words is "twenty-eight million, two hundred seventy-eight thousand, five hundred twelve".