280376879540 has 48 divisors (see below), whose sum is σ = 644923717200. Its totient is φ = 101913864192.

The previous prime is 280376879459. The next prime is 280376879543. The reversal of 280376879540 is 45978673082.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 13001016484 + 267375863056 = 114022^2 + 517084^2 .

It is a super-3 number, since 3×280376879540³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 280376879540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280376879543) 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, 14208035 + ... + 14227754.

It is an arithmetic number, because the mean of its divisors is an integer number (13435910775).

Almost surely, 2^280376879540 is an apocalyptic number.

280376879540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280376879540 is an abundant number, since it is smaller than the sum of its proper divisors (364546837660).

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

280376879540 is a wasteful number, since it uses less digits than its factorization.

280376879540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28435844 (or 28435842 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 280376879540 in words is "two hundred eighty billion, three hundred seventy-six million, eight hundred seventy-nine thousand, five hundred forty".