280503463728 has 80 divisors (see below), whose sum is σ = 751746215520. Its totient is φ = 90021076992.

The previous prime is 280503463661. The next prime is 280503463753. The reversal of 280503463728 is 827364305082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205950 + ... + 776802.

It is an arithmetic number, because the mean of its divisors is an integer number (9396827694).

Almost surely, 2^280503463728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280503463728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375873107760).

280503463728 is an abundant number, since it is smaller than the sum of its proper divisors (471242751792).

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

280503463728 is a wasteful number, since it uses less digits than its factorization.

280503463728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571246 (or 571240 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 280503463728 in words is "two hundred eighty billion, five hundred three million, four hundred sixty-three thousand, seven hundred twenty-eight".