28208308 has 12 divisors (see below), whose sum is σ = 49540960. Its totient is φ = 14053752.

The previous prime is 28208267. The next prime is 28208317. The reversal of 28208308 is 80380282.

It is a self number, because there is not a number n which added to its sum of digits gives 28208308.

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, 11328 + ... + 13591.

Almost surely, 2^28208308 is an apocalyptic number.

It is an amenable number.

28208308 is a deficient number, since it is larger than the sum of its proper divisors (21332652).

28208308 is a wasteful number, since it uses less digits than its factorization.

28208308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25206 (or 25204 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28208308 is about 5311.1494047899. The cubic root of 28208308 is about 304.4100681443.

The spelling of 28208308 in words is "twenty-eight million, two hundred eight thousand, three hundred eight".