280485265320 has 128 divisors (see below), whose sum is σ = 1006870233600. Its totient is φ = 69042523392.

The previous prime is 280485265223. The next prime is 280485265331. The reversal of 280485265320 is 23562584082.

280485265320 is a `hidden beast` number, since 2 + 80 + 48 + 526 + 5 + 3 + 2 + 0 = 666.

280485265320 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9974752 + ... + 10002831.

It is an arithmetic number, because the mean of its divisors is an integer number (7866173700).

Almost surely, 2^280485265320 is an apocalyptic number.

280485265320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280485265320 is an abundant number, since it is smaller than the sum of its proper divisors (726384968280).

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

280485265320 is a wasteful number, since it uses less digits than its factorization.

280485265320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19977616 (or 19977606 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 280485265320 in words is "two hundred eighty billion, four hundred eighty-five million, two hundred sixty-five thousand, three hundred twenty".