280268040285 has 24 divisors (see below), whose sum is σ = 485831341944. Its totient is φ = 149466009600.

The previous prime is 280268040251. The next prime is 280268040317. The reversal of 280268040285 is 582040862082.

It can be written as a sum of positive squares in 4 ways, for example, as 1287589689 + 278980450596 = 35883^2 + 528186^2 .

It is not a de Polignac number, because 280268040285 - 2²⁷ = 280133822557 is a prime.

It is a super-3 number, since 3×280268040285³ (a number of 35 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 280268040285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471685 + ... + 884885.

It is an arithmetic number, because the mean of its divisors is an integer number (20242972581).

Almost surely, 2^280268040285 is an apocalyptic number.

It is an amenable number.

280268040285 is a deficient number, since it is larger than the sum of its proper divisors (205563301659).

280268040285 is a wasteful number, since it uses less digits than its factorization.

280268040285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428285 (or 428282 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 45.

The spelling of 280268040285 in words is "two hundred eighty billion, two hundred sixty-eight million, forty thousand, two hundred eighty-five".