280439005668 has 24 divisors (see below), whose sum is σ = 670317624480. Its totient is φ = 91199676480.

The previous prime is 280439005657. The next prime is 280439005703. The reversal of 280439005668 is 866500934082.

It is a super-2 number, since 2×280439005668² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 280439005668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284998498 + ... + 284999481.

It is an arithmetic number, because the mean of its divisors is an integer number (27929901020).

Almost surely, 2^280439005668 is an apocalyptic number.

It is an amenable number.

280439005668 is an abundant number, since it is smaller than the sum of its proper divisors (389878618812).

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

280439005668 is a wasteful number, since it uses less digits than its factorization.

280439005668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569998027 (or 569998025 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 280439005668 in words is "two hundred eighty billion, four hundred thirty-nine million, five thousand, six hundred sixty-eight".