28275980 has 24 divisors (see below), whose sum is σ = 59564400. Its totient is φ = 11275200.

The previous prime is 28275979. The next prime is 28275991. The reversal of 28275980 is 8957282.

It is a happy number.

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, 4955 + ... + 9005.

It is an arithmetic number, because the mean of its divisors is an integer number (2481850).

Almost surely, 2^28275980 is an apocalyptic number.

28275980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28275980 is an abundant number, since it is smaller than the sum of its proper divisors (31288420).

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

28275980 is a wasteful number, since it uses less digits than its factorization.

28275980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28275980 is about 5317.5163375395. The cubic root of 28275980 is about 304.6533012942.

The spelling of 28275980 in words is "twenty-eight million, two hundred seventy-five thousand, nine hundred eighty".