28305876 has 12 divisors (see below), whose sum is σ = 66047072. Its totient is φ = 9435288.

The previous prime is 28305863. The next prime is 28305913. The reversal of 28305876 is 67850382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28305876² = 1602445232254752, which contains 22 as substring.

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, 1179400 + ... + 1179423.

Almost surely, 2^28305876 is an apocalyptic number.

It is an amenable number.

28305876 is an abundant number, since it is smaller than the sum of its proper divisors (37741196).

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

28305876 is a wasteful number, since it uses less digits than its factorization.

28305876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358830 (or 2358828 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28305876 is about 5320.3266816992. The cubic root of 28305876 is about 304.7606327591.

The spelling of 28305876 in words is "twenty-eight million, three hundred five thousand, eight hundred seventy-six".