28308056 has 16 divisors (see below), whose sum is σ = 60660240. Its totient is φ = 12132000.

The previous prime is 28308017. The next prime is 28308067. The reversal of 28308056 is 65080382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252695 + ... + 252806.

It is an arithmetic number, because the mean of its divisors is an integer number (3791265).

Almost surely, 2^28308056 is an apocalyptic number.

It is an amenable number.

28308056 is an abundant number, since it is smaller than the sum of its proper divisors (32352184).

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

28308056 is a wasteful number, since it uses less digits than its factorization.

28308056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505514 (or 505510 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28308056 is about 5320.5315523921. The cubic root of 28308056 is about 304.7684563541.

The spelling of 28308056 in words is "twenty-eight million, three hundred eight thousand, fifty-six".