28785756 has 24 divisors (see below), whose sum is σ = 67253760. Its totient is φ = 9582832.

The previous prime is 28785749. The next prime is 28785767. The reversal of 28785756 is 65758782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16435 + ... + 18101.

It is an arithmetic number, because the mean of its divisors is an integer number (2802240).

Almost surely, 2^28785756 is an apocalyptic number.

It is an amenable number.

28785756 is an abundant number, since it is smaller than the sum of its proper divisors (38468004).

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

28785756 is a wasteful number, since it uses less digits than its factorization.

28785756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113 (or 3111 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 28785756 is about 5365.2358755231. The cubic root of 28785756 is about 306.4732307743.

The spelling of 28785756 in words is "twenty-eight million, seven hundred eighty-five thousand, seven hundred fifty-six".