28102008 has 48 divisors (see below), whose sum is σ = 77230440. Its totient is φ = 8514880.

The previous prime is 28102001. The next prime is 28102043. The reversal of 28102008 is 80020182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28102001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1935 + ... + 7742.

Almost surely, 2^28102008 is an apocalyptic number.

It is an amenable number.

28102008 is an abundant number, since it is smaller than the sum of its proper divisors (49128432).

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

28102008 is a wasteful number, since it uses less digits than its factorization.

28102008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708 (or 9693 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28102008 is about 5301.1327091481. The cubic root of 28102008 is about 304.0272078603.

The spelling of 28102008 in words is "twenty-eight million, one hundred two thousand, eight".