28368280 has 32 divisors (see below), whose sum is σ = 64088640. Its totient is φ = 11301120.

The previous prime is 28368253. The next prime is 28368283. The reversal of 28368280 is 8286382.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28368283) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9532 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (2002770).

Almost surely, 2^28368280 is an apocalyptic number.

28368280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28368280 is an abundant number, since it is smaller than the sum of its proper divisors (35720360).

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

28368280 is a wasteful number, since it uses less digits than its factorization.

28368280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 28368280 is about 5326.1881303611. The cubic root of 28368280 is about 304.9844299138.

The spelling of 28368280 in words is "twenty-eight million, three hundred sixty-eight thousand, two hundred eighty".