28284522840 has 480 divisors, whose sum is σ = 111368893680. Its totient is φ = 6419492352.

The previous prime is 28284522829. The next prime is 28284522857. The reversal of 28284522840 is 4822548282.

28284522840 is a `hidden beast` number, since 2 + 8 + 2 + 84 + 522 + 8 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 25877334 + ... + 25878426.

Almost surely, 2^28284522840 is an apocalyptic number.

28284522840 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 28284522840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55684446840).

28284522840 is an abundant number, since it is smaller than the sum of its proper divisors (83084370840).

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

28284522840 is a wasteful number, since it uses less digits than its factorization.

28284522840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 45.

The spelling of 28284522840 in words is "twenty-eight billion, two hundred eighty-four million, five hundred twenty-two thousand, eight hundred forty".