280704000 has 352 divisors, whose sum is σ = 1011643776. Its totient is φ = 68812800.

The previous prime is 280703993. The next prime is 280704001. The reversal of 280704000 is 407082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280704001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6527979 + ... + 6528021.

It is an arithmetic number, because the mean of its divisors is an integer number (2873988).

Almost surely, 2^280704000 is an apocalyptic number.

280704000 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 280704000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505821888).

280704000 is an abundant number, since it is smaller than the sum of its proper divisors (730939776).

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

280704000 is a wasteful number, since it uses less digits than its factorization.

280704000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 280704000 is about 16754.2233481591. The cubic root of 280704000 is about 654.7610961764.

The spelling of 280704000 in words is "two hundred eighty million, seven hundred four thousand".