28163793 has 16 divisors (see below), whose sum is σ = 43009920. Its totient is φ = 16058496.

The previous prime is 28163789. The next prime is 28163801. The reversal of 28163793 is 39736182.

It is not a de Polignac number, because 28163793 - 2² = 28163789 is a prime.

It is a super-2 number, since 2×28163793² = 1586398472293698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28163743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10771 + ... + 13127.

It is an arithmetic number, because the mean of its divisors is an integer number (2688120).

Almost surely, 2^28163793 is an apocalyptic number.

It is an amenable number.

28163793 is a deficient number, since it is larger than the sum of its proper divisors (14846127).

28163793 is a wasteful number, since it uses less digits than its factorization.

28163793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its digits is 54432, while the sum is 39.

The square root of 28163793 is about 5306.9570377006. The cubic root of 28163793 is about 304.2498559055.

The spelling of 28163793 in words is "twenty-eight million, one hundred sixty-three thousand, seven hundred ninety-three".