28163568 has 20 divisors (see below), whose sum is σ = 72756008. Its totient is φ = 9387840.

The previous prime is 28163557. The next prime is 28163587. The reversal of 28163568 is 86536182.

It is a happy number.

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, 293323 + ... + 293418.

Almost surely, 2^28163568 is an apocalyptic number.

It is an amenable number.

28163568 is an abundant number, since it is smaller than the sum of its proper divisors (44592440).

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

28163568 is a wasteful number, since it uses less digits than its factorization.

28163568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586752 (or 586746 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28163568 is about 5306.9358390695. The cubic root of 28163568 is about 304.2490456879.

The spelling of 28163568 in words is "twenty-eight million, one hundred sixty-three thousand, five hundred sixty-eight".