280028027778 has 16 divisors (see below), whose sum is σ = 560969694336. Its totient is φ = 93190402800.

The previous prime is 280028027771. The next prime is 280028027879. The reversal of 280028027778 is 877720820082.

It is a self number, because there is not a number n which added to its sum of digits gives 280028027778.

It is not an unprimeable number, because it can be changed into a prime (280028027771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38064298 + ... + 38071653.

It is an arithmetic number, because the mean of its divisors is an integer number (35060605896).

Almost surely, 2^280028027778 is an apocalyptic number.

280028027778 is an abundant number, since it is smaller than the sum of its proper divisors (280941666558).

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

280028027778 is a wasteful number, since it uses less digits than its factorization.

280028027778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76136569.

The product of its (nonzero) digits is 1404928, while the sum is 51.

The spelling of 280028027778 in words is "two hundred eighty billion, twenty-eight million, twenty-seven thousand, seven hundred seventy-eight".