28708776 has 32 divisors (see below), whose sum is σ = 79747200. Its totient is φ = 9569520.

The previous prime is 28708769. The next prime is 28708789. The reversal of 28708776 is 67780782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66240 + ... + 66671.

It is an arithmetic number, because the mean of its divisors is an integer number (2492100).

Almost surely, 2^28708776 is an apocalyptic number.

It is an amenable number.

28708776 is an abundant number, since it is smaller than the sum of its proper divisors (51038424).

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

28708776 is a wasteful number, since it uses less digits than its factorization.

28708776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132926 (or 132916 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 28708776 is about 5358.0571105579. The cubic root of 28708776 is about 306.1997926301.

The spelling of 28708776 in words is "twenty-eight million, seven hundred eight thousand, seven hundred seventy-six".