28056880 has 20 divisors (see below), whose sum is σ = 65232432. Its totient is φ = 11222720.

The previous prime is 28056869. The next prime is 28056907. The reversal of 28056880 is 8865082.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175276 + ... + 175435.

Almost surely, 2^28056880 is an apocalyptic number.

28056880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28056880 is an abundant number, since it is smaller than the sum of its proper divisors (37175552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28056880 is a wasteful number, since it uses less digits than its factorization.

28056880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350724 (or 350718 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 28056880 is about 5296.8745501475. The cubic root of 28056880 is about 303.8643785633.

The spelling of 28056880 in words is "twenty-eight million, fifty-six thousand, eight hundred eighty".