28080940 has 24 divisors (see below), whose sum is σ = 62439552. Its totient is φ = 10571520.

The previous prime is 28080931. The next prime is 28080967. The reversal of 28080940 is 4908082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40956 + ... + 41635.

It is an arithmetic number, because the mean of its divisors is an integer number (2601648).

Almost surely, 2^28080940 is an apocalyptic number.

28080940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28080940 is an abundant number, since it is smaller than the sum of its proper divisors (34358612).

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

28080940 is a wasteful number, since it uses less digits than its factorization.

28080940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82617 (or 82615 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28080940 is about 5299.1452140888. The cubic root of 28080940 is about 303.9512127387.

The spelling of 28080940 in words is "twenty-eight million, eighty thousand, nine hundred forty".