28725064 has 16 divisors (see below), whose sum is σ = 54254700. Its totient is φ = 14257152.

The previous prime is 28725049. The next prime is 28725071. The reversal of 28725064 is 46052782.

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 16900 = 5358^2 + 130^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12009 + ... + 14200.

Almost surely, 2^28725064 is an apocalyptic number.

It is an amenable number.

28725064 is a deficient number, since it is larger than the sum of its proper divisors (25529636).

28725064 is a wasteful number, since it uses less digits than its factorization.

28725064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26352 (or 26348 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28725064 is about 5359.5768489686. The cubic root of 28725064 is about 306.2576894363.

The spelling of 28725064 in words is "twenty-eight million, seven hundred twenty-five thousand, sixty-four".