280486866428 has 12 divisors (see below), whose sum is σ = 490976530800. Its totient is φ = 140207857632.

The previous prime is 280486866421. The next prime is 280486866437. The reversal of 280486866428 is 824668684082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280486866421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8876153 + ... + 8907696.

It is an arithmetic number, because the mean of its divisors is an integer number (40914710900).

Almost surely, 2^280486866428 is an apocalyptic number.

It is an amenable number.

280486866428 is a deficient number, since it is larger than the sum of its proper divisors (210489664372).

280486866428 is a wasteful number, since it uses less digits than its factorization.

280486866428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17787796 (or 17787794 counting only the distinct ones).

The product of its (nonzero) digits is 56623104, while the sum is 62.

The spelling of 280486866428 in words is "two hundred eighty billion, four hundred eighty-six million, eight hundred sixty-six thousand, four hundred twenty-eight".