28268380 has 48 divisors (see below), whose sum is σ = 70801920. Its totient is φ = 9269568.

The previous prime is 28268377. The next prime is 28268381. The reversal of 28268380 is 8386282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1170 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (1475040).

Almost surely, 2^28268380 is an apocalyptic number.

28268380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28268380 is an abundant number, since it is smaller than the sum of its proper divisors (42533540).

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

28268380 is a wasteful number, since it uses less digits than its factorization.

28268380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8818 (or 8816 counting only the distinct ones).

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

The square root of 28268380 is about 5316.8016701773. The cubic root of 28268380 is about 304.6260040079.

The spelling of 28268380 in words is "twenty-eight million, two hundred sixty-eight thousand, three hundred eighty".