28805756 has 12 divisors (see below), whose sum is σ = 57611568. Its totient is φ = 12345312.

The previous prime is 28805741. The next prime is 28805761. The reversal of 28805756 is 65750882.

28805756 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 514361 + ... + 514416.

It is an arithmetic number, because the mean of its divisors is an integer number (4800964).

Almost surely, 2^28805756 is an apocalyptic number.

It is an amenable number.

28805756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28805756 is a wasteful number, since it uses less digits than its factorization.

28805756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028788 (or 1028786 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28805756 is about 5367.0994028432. The cubic root of 28805756 is about 306.5441923244.

The spelling of 28805756 in words is "twenty-eight million, eight hundred five thousand, seven hundred fifty-six".