280794768 has 80 divisors (see below), whose sum is σ = 768998400. Its totient is φ = 88041600.

The previous prime is 280794757. The next prime is 280794769. The reversal of 280794768 is 867497082.

It is a self number, because there is not a number n which added to its sum of digits gives 280794768.

It is not an unprimeable number, because it can be changed into a prime (280794769) 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, 136693 + ... + 138731.

It is an arithmetic number, because the mean of its divisors is an integer number (9612480).

Almost surely, 2^280794768 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 280794768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384499200).

280794768 is an abundant number, since it is smaller than the sum of its proper divisors (488203632).

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

280794768 is a wasteful number, since it uses less digits than its factorization.

280794768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 280794768 is about 16756.9319387530. The cubic root of 280794768 is about 654.8316627405.

The spelling of 280794768 in words is "two hundred eighty million, seven hundred ninety-four thousand, seven hundred sixty-eight".