284242728 has 256 divisors, whose sum is σ = 937728000. Its totient is φ = 71124480.

The previous prime is 284242727. The next prime is 284242757. The reversal of 284242728 is 827242482.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (284242727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3893700 + ... + 3893772.

It is an arithmetic number, because the mean of its divisors is an integer number (3663000).

Almost surely, 2^284242728 is an apocalyptic number.

284242728 is a gapful number since it is divisible by the number (28) 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 284242728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468864000).

284242728 is an abundant number, since it is smaller than the sum of its proper divisors (653485272).

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

284242728 is a wasteful number, since it uses less digits than its factorization.

284242728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 139 counting only the distinct ones).

The product of its digits is 114688, while the sum is 39.

The square root of 284242728 is about 16859.4996367033. The cubic root of 284242728 is about 657.5010552880.

The spelling of 284242728 in words is "two hundred eighty-four million, two hundred forty-two thousand, seven hundred twenty-eight".