280668672 has 160 divisors (see below), whose sum is σ = 844588800. Its totient is φ = 92012544.

The previous prime is 280668671. The next prime is 280668719. The reversal of 280668672 is 276866082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (280668671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091968 + ... + 1092224.

It is an arithmetic number, because the mean of its divisors is an integer number (5278680).

Almost surely, 2^280668672 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 280668672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422294400).

280668672 is an abundant number, since it is smaller than the sum of its proper divisors (563920128).

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

280668672 is an equidigital number, since it uses as much as digits as its factorization.

280668672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 280668672 is about 16753.1690136523. The cubic root of 280668672 is about 654.7336267062.

The spelling of 280668672 in words is "two hundred eighty million, six hundred sixty-eight thousand, six hundred seventy-two".