28684260 has 144 divisors (see below), whose sum is σ = 98313600. Its totient is φ = 6937920.

The previous prime is 28684237. The next prime is 28684261. The reversal of 28684260 is 6248682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28684261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65121 + ... + 65559.

Almost surely, 2^28684260 is an apocalyptic number.

28684260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28684260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49156800).

28684260 is an abundant number, since it is smaller than the sum of its proper divisors (69629340).

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

28684260 is a wasteful number, since it uses less digits than its factorization.

28684260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 28684260 is about 5355.7688523684. The cubic root of 28684260 is about 306.1126075367.

The spelling of 28684260 in words is "twenty-eight million, six hundred eighty-four thousand, two hundred sixty".