28168057 has 8 divisors (see below), whose sum is σ = 29256192. Its totient is φ = 27091200.

The previous prime is 28168037. The next prime is 28168061. The reversal of 28168057 is 75086182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28168057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28168037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2457 + ... + 7897.

It is an arithmetic number, because the mean of its divisors is an integer number (3657024).

Almost surely, 2^28168057 is an apocalyptic number.

It is an amenable number.

28168057 is a deficient number, since it is larger than the sum of its proper divisors (1088135).

28168057 is a wasteful number, since it uses less digits than its factorization.

28168057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5639.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28168057 is about 5307.3587593077. The cubic root of 28168057 is about 304.2652096130.

The spelling of 28168057 in words is "twenty-eight million, one hundred sixty-eight thousand, fifty-seven".