28107856 has 20 divisors (see below), whose sum is σ = 62239072. Its totient is φ = 12046176.

The previous prime is 28107841. The next prime is 28107857. The reversal of 28107856 is 65870182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28107857) by changing a digit.

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, 125370 + ... + 125593.

Almost surely, 2^28107856 is an apocalyptic number.

It is an amenable number.

28107856 is an abundant number, since it is smaller than the sum of its proper divisors (34131216).

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

28107856 is a wasteful number, since it uses less digits than its factorization.

28107856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250978 (or 250972 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28107856 is about 5301.6842606855. The cubic root of 28107856 is about 304.0482956511.

The spelling of 28107856 in words is "twenty-eight million, one hundred seven thousand, eight hundred fifty-six".