28365884 has 6 divisors (see below), whose sum is σ = 49640304. Its totient is φ = 14182940.

The previous prime is 28365871. The next prime is 28365889. The reversal of 28365884 is 48856382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28365889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3545732 + ... + 3545739.

It is an arithmetic number, because the mean of its divisors is an integer number (8273384).

Almost surely, 2^28365884 is an apocalyptic number.

It is an amenable number.

28365884 is a deficient number, since it is larger than the sum of its proper divisors (21274420).

28365884 is a wasteful number, since it uses less digits than its factorization.

28365884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7091475 (or 7091473 counting only the distinct ones).

The product of its digits is 368640, while the sum is 44.

The square root of 28365884 is about 5325.9631992720. The cubic root of 28365884 is about 304.9758432897.

The spelling of 28365884 in words is "twenty-eight million, three hundred sixty-five thousand, eight hundred eighty-four".