28308756 has 48 divisors (see below), whose sum is σ = 78099840. Its totient is φ = 7808640.

The previous prime is 28308739. The next prime is 28308767. The reversal of 28308756 is 65780382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3375 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (1627080).

Almost surely, 2^28308756 is an apocalyptic number.

It is an amenable number.

28308756 is an abundant number, since it is smaller than the sum of its proper divisors (49791084).

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

28308756 is a wasteful number, since it uses less digits than its factorization.

28308756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11664 (or 11662 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28308756 is about 5320.5973348864. The cubic root of 28308756 is about 304.7709684324.

The spelling of 28308756 in words is "twenty-eight million, three hundred eight thousand, seven hundred fifty-six".