280455440548920 has 256 divisors, whose sum is σ = 1041880718269440. Its totient is φ = 58809991016448.

The previous prime is 280455440548897. The next prime is 280455440548951. The reversal of 280455440548920 is 29845044554082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77001429 + ... + 80561348.

It is an arithmetic number, because the mean of its divisors is an integer number (4069846555740).

Almost surely, 2^{280455440548920} is an apocalyptic number.

280455440548920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280455440548920 is an abundant number, since it is smaller than the sum of its proper divisors (761425277720520).

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

280455440548920 is a wasteful number, since it uses less digits than its factorization.

280455440548920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157562974 (or 157562970 counting only the distinct ones).

The product of its (nonzero) digits is 73728000, while the sum is 60.

The spelling of 280455440548920 in words is "two hundred eighty trillion, four hundred fifty-five billion, four hundred forty million, five hundred forty-eight thousand, nine hundred twenty".