28259808 has 48 divisors (see below), whose sum is σ = 74462976. Its totient is φ = 9384320.

The previous prime is 28259789. The next prime is 28259813. The reversal of 28259808 is 80895282.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28259808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41035 + ... + 41717.

It is an arithmetic number, because the mean of its divisors is an integer number (1551312).

Almost surely, 2^28259808 is an apocalyptic number.

It is an amenable number.

28259808 is an abundant number, since it is smaller than the sum of its proper divisors (46203168).

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

28259808 is a wasteful number, since it uses less digits than its factorization.

28259808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 28259808 is about 5315.9954853254. The cubic root of 28259808 is about 304.5952096706.

The spelling of 28259808 in words is "twenty-eight million, two hundred fifty-nine thousand, eight hundred eight".