28080920 has 48 divisors (see below), whose sum is σ = 73502640. Its totient is φ = 9627072.

The previous prime is 28080911. The next prime is 28080931. The reversal of 28080920 is 2908082.

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 in 11 ways as a sum of consecutive naturals, for example, 5204 + ... + 9123.

It is an arithmetic number, because the mean of its divisors is an integer number (1531305).

Almost surely, 2^28080920 is an apocalyptic number.

28080920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28080920 is an abundant number, since it is smaller than the sum of its proper divisors (45421720).

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

28080920 is a wasteful number, since it uses less digits than its factorization.

28080920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14352 (or 14341 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28080920 is about 5299.1433269916. The cubic root of 28080920 is about 303.9511405779.

It can be divided in two parts, 280 and 80920, that multiplied together give a square (22657600 = 4760²).

The spelling of 28080920 in words is "twenty-eight million, eighty thousand, nine hundred twenty".