28267980 has 48 divisors (see below), whose sum is σ = 85241184. Its totient is φ = 6958080.

The previous prime is 28267979. The next prime is 28267999. The reversal of 28267980 is 8976282.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17341 + ... + 18900.

It is an arithmetic number, because the mean of its divisors is an integer number (1775858).

Almost surely, 2^28267980 is an apocalyptic number.

28267980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28267980 is an abundant number, since it is smaller than the sum of its proper divisors (56973204).

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

28267980 is a wasteful number, since it uses less digits than its factorization.

28267980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36266 (or 36264 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28267980 is about 5316.7640534445. The cubic root of 28267980 is about 304.6245671731.

The spelling of 28267980 in words is "twenty-eight million, two hundred sixty-seven thousand, nine hundred eighty".