28280280384 has 280 divisors, whose sum is σ = 88292635200. Its totient is φ = 8932847616.

The previous prime is 28280280359. The next prime is 28280280389. The reversal of 28280280384 is 48308208282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280280389) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13472167 + ... + 13474265.

It is an arithmetic number, because the mean of its divisors is an integer number (315330840).

Almost surely, 2^28280280384 is an apocalyptic number.

28280280384 is a gapful number since it is divisible by the number (24) 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 28280280384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44146317600).

28280280384 is an abundant number, since it is smaller than the sum of its proper divisors (60012354816).

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

28280280384 is a wasteful number, since it uses less digits than its factorization.

28280280384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 45.

The spelling of 28280280384 in words is "twenty-eight billion, two hundred eighty million, two hundred eighty thousand, three hundred eighty-four".