280752480 has 336 divisors, whose sum is σ = 1041148080. Its totient is φ = 71414784.

The previous prime is 280752473. The next prime is 280752497. The reversal of 280752480 is 84257082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3382519 + ... + 3382601.

It is an arithmetic number, because the mean of its divisors is an integer number (3098655).

Almost surely, 2^280752480 is an apocalyptic number.

280752480 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 280752480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520574040).

280752480 is an abundant number, since it is smaller than the sum of its proper divisors (760395600).

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

280752480 is an equidigital number, since it uses as much as digits as its factorization.

280752480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 280752480 is about 16755.6700850787. The cubic root of 280752480 is about 654.7987883013.

The spelling of 280752480 in words is "two hundred eighty million, seven hundred fifty-two thousand, four hundred eighty".