28263684 has 12 divisors (see below), whose sum is σ = 65948624. Its totient is φ = 9421224.

The previous prime is 28263667. The next prime is 28263691. The reversal of 28263684 is 48636282.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1177642 + ... + 1177665.

Almost surely, 2^28263684 is an apocalyptic number.

It is an amenable number.

28263684 is an abundant number, since it is smaller than the sum of its proper divisors (37684940).

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

28263684 is a wasteful number, since it uses less digits than its factorization.

28263684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355314 (or 2355312 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 28263684 is about 5316.3600329549. The cubic root of 28263684 is about 304.6091347128.

The spelling of 28263684 in words is "twenty-eight million, two hundred sixty-three thousand, six hundred eighty-four".