28102808 has 8 divisors (see below), whose sum is σ = 52692780. Its totient is φ = 14051400.

The previous prime is 28102807. The next prime is 28102817. The reversal of 28102808 is 80820182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28102807) by changing a digit.

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 as a sum of consecutive naturals, namely, 1756418 + ... + 1756433.

Almost surely, 2^28102808 is an apocalyptic number.

It is an amenable number.

28102808 is a deficient number, since it is larger than the sum of its proper divisors (24589972).

28102808 is a wasteful number, since it uses less digits than its factorization.

28102808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512857 (or 3512853 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 28102808 is about 5301.2081641830. The cubic root of 28102808 is about 304.0300928197.

The spelling of 28102808 in words is "twenty-eight million, one hundred two thousand, eight hundred eight".