28840504 has 32 divisors (see below), whose sum is σ = 67420800. Its totient is φ = 11236320.

The previous prime is 28840481. The next prime is 28840523. The reversal of 28840504 is 40504882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22794 + ... + 24025.

It is an arithmetic number, because the mean of its divisors is an integer number (2106900).

Almost surely, 2^28840504 is an apocalyptic number.

It is an amenable number.

28840504 is an abundant number, since it is smaller than the sum of its proper divisors (38580296).

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

28840504 is a wasteful number, since it uses less digits than its factorization.

28840504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46843 (or 46839 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 28840504 is about 5370.3355574861. The cubic root of 28840504 is about 306.6674028548.

The spelling of 28840504 in words is "twenty-eight million, eight hundred forty thousand, five hundred four".