280512960 has 448 divisors, whose sum is σ = 1160678400. Its totient is φ = 56070144.

The previous prime is 280512949. The next prime is 280512997. The reversal of 280512960 is 69215082.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14763831 + ... + 14763849.

It is an arithmetic number, because the mean of its divisors is an integer number (2590800).

Almost surely, 2^280512960 is an apocalyptic number.

280512960 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 280512960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580339200).

280512960 is an abundant number, since it is smaller than the sum of its proper divisors (880165440).

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

280512960 is a wasteful number, since it uses less digits than its factorization.

280512960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 280512960 is about 16748.5211287445. The cubic root of 280512960 is about 654.6125245526.

The spelling of 280512960 in words is "two hundred eighty million, five hundred twelve thousand, nine hundred sixty".