28719808 has 28 divisors (see below), whose sum is σ = 61376560. Its totient is φ = 13254912.

The previous prime is 28719797. The next prime is 28719827. The reversal of 28719808 is 80891782.

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, 16428 + ... + 18091.

It is an arithmetic number, because the mean of its divisors is an integer number (2192020).

Almost surely, 2^28719808 is an apocalyptic number.

It is an amenable number.

28719808 is an abundant number, since it is smaller than the sum of its proper divisors (32656752).

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

28719808 is a wasteful number, since it uses less digits than its factorization.

28719808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34544 (or 34534 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 28719808 is about 5359.0864893189. The cubic root of 28719808 is about 306.2390090183.

The spelling of 28719808 in words is "twenty-eight million, seven hundred nineteen thousand, eight hundred eight".