28304168 has 32 divisors (see below), whose sum is σ = 55728000. Its totient is φ = 13451328.

The previous prime is 28304161. The next prime is 28304197. The reversal of 28304168 is 86140382.

It is a super-2 number, since 2×28304168² = 1602251852344448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36230 + ... + 37002.

It is an arithmetic number, because the mean of its divisors is an integer number (1741500).

Almost surely, 2^28304168 is an apocalyptic number.

It is an amenable number.

28304168 is a deficient number, since it is larger than the sum of its proper divisors (27423832).

28304168 is a wasteful number, since it uses less digits than its factorization.

28304168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28304168 is about 5320.1661628186. The cubic root of 28304168 is about 304.7545027995.

The spelling of 28304168 in words is "twenty-eight million, three hundred four thousand, one hundred sixty-eight".