28715208 has 32 divisors (see below), whose sum is σ = 72360960. Its totient is φ = 9495360.

The previous prime is 28715173. The next prime is 28715231. The reversal of 28715208 is 80251782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663 + ... + 7758.

It is an arithmetic number, because the mean of its divisors is an integer number (2261280).

Almost surely, 2^28715208 is an apocalyptic number.

It is an amenable number.

28715208 is an abundant number, since it is smaller than the sum of its proper divisors (43645752).

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

28715208 is a wasteful number, since it uses less digits than its factorization.

28715208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557 (or 9553 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28715208 is about 5358.6572945095. The cubic root of 28715208 is about 306.2226582282. Note that the first 3 decimals are identical.

The spelling of 28715208 in words is "twenty-eight million, seven hundred fifteen thousand, two hundred eight".