28057136 has 20 divisors (see below), whose sum is σ = 54651264. Its totient is φ = 13953600.

The previous prime is 28057067. The next prime is 28057151. The reversal of 28057136 is 63175082.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 7646.

Almost surely, 2^28057136 is an apocalyptic number.

It is an amenable number.

28057136 is a deficient number, since it is larger than the sum of its proper divisors (26594128).

28057136 is a wasteful number, since it uses less digits than its factorization.

28057136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380 (or 9374 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 28057136 is about 5296.8987152861. The cubic root of 28057136 is about 303.8653027459.

The spelling of 28057136 in words is "twenty-eight million, fifty-seven thousand, one hundred thirty-six".