28388056 has 16 divisors (see below), whose sum is σ = 53648640. Its totient is φ = 14081760.

The previous prime is 28388039. The next prime is 28388077. The reversal of 28388056 is 65088382.

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, 12955 + ... + 14986.

It is an arithmetic number, because the mean of its divisors is an integer number (3353040).

Almost surely, 2^28388056 is an apocalyptic number.

It is an amenable number.

28388056 is a deficient number, since it is larger than the sum of its proper divisors (25260584).

28388056 is a wasteful number, since it uses less digits than its factorization.

28388056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28074 (or 28070 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28388056 is about 5328.0442941102. The cubic root of 28388056 is about 305.0552833588.

The spelling of 28388056 in words is "twenty-eight million, three hundred eighty-eight thousand, fifty-six".