28382280 has 32 divisors (see below), whose sum is σ = 85147200. Its totient is φ = 7568576.

The previous prime is 28382273. The next prime is 28382311. The reversal of 28382280 is 8228382.

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, 118140 + ... + 118379.

It is an arithmetic number, because the mean of its divisors is an integer number (2660850).

Almost surely, 2^28382280 is an apocalyptic number.

28382280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28382280 is an abundant number, since it is smaller than the sum of its proper divisors (56764920).

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

28382280 is a wasteful number, since it uses less digits than its factorization.

28382280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236533 (or 236529 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28382280 is about 5327.5022290000. The cubic root of 28382280 is about 305.0345925111.

The spelling of 28382280 in words is "twenty-eight million, three hundred eighty-two thousand, two hundred eighty".