280535796 has 72 divisors (see below), whose sum is σ = 725306400. Its totient is φ = 91398720.

The previous prime is 280535791. The next prime is 280535797. The reversal of 280535796 is 697535082.

It is a happy number.

280535796 is a `hidden beast` number, since 28 + 0 + 53 + 579 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280535791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 571111 + ... + 571601.

It is an arithmetic number, because the mean of its divisors is an integer number (10073700).

Almost surely, 2^280535796 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 280535796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362653200).

280535796 is an abundant number, since it is smaller than the sum of its proper divisors (444770604).

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

280535796 is a wasteful number, since it uses less digits than its factorization.

280535796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 280535796 is about 16749.2028467029. The cubic root of 280535796 is about 654.6302876368.

The spelling of 280535796 in words is "two hundred eighty million, five hundred thirty-five thousand, seven hundred ninety-six".