28169056 has 12 divisors (see below), whose sum is σ = 55457892. Its totient is φ = 14084512.

The previous prime is 28169033. The next prime is 28169083. The reversal of 28169056 is 65096182.

It is a super-2 number, since 2×28169056² = 1586991431862272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440110 + ... + 440173.

It is an arithmetic number, because the mean of its divisors is an integer number (4621491).

Almost surely, 2^28169056 is an apocalyptic number.

It is an amenable number.

28169056 is a deficient number, since it is larger than the sum of its proper divisors (27288836).

28169056 is an equidigital number, since it uses as much as digits as its factorization.

28169056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880293 (or 880285 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28169056 is about 5307.4528730833. The cubic root of 28169056 is about 304.2688065639.

The spelling of 28169056 in words is "twenty-eight million, one hundred sixty-nine thousand, fifty-six".