28569884 has 12 divisors (see below), whose sum is σ = 57139824. Its totient is φ = 12244224.

The previous prime is 28569869. The next prime is 28569889. The reversal of 28569884 is 48896582.

28569884 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510149 + ... + 510204.

It is an arithmetic number, because the mean of its divisors is an integer number (4761652).

Almost surely, 2^28569884 is an apocalyptic number.

It is an amenable number.

28569884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28569884 is a wasteful number, since it uses less digits than its factorization.

28569884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020364 (or 1020362 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The square root of 28569884 is about 5345.0803548684. The cubic root of 28569884 is about 305.7051997266.

The spelling of 28569884 in words is "twenty-eight million, five hundred sixty-nine thousand, eight hundred eighty-four".