280061728 has 24 divisors (see below), whose sum is σ = 552955788. Its totient is φ = 139628544.

The previous prime is 280061711. The next prime is 280061753. The reversal of 280061728 is 827160082.

It can be written as a sum of positive squares in 2 ways, for example, as 260241424 + 19820304 = 16132^2 + 4452^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280061693 and 280061702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101 + ... + 23692.

Almost surely, 2^280061728 is an apocalyptic number.

It is an amenable number.

280061728 is a deficient number, since it is larger than the sum of its proper divisors (272894060).

280061728 is a wasteful number, since it uses less digits than its factorization.

280061728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25156 (or 25148 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 280061728 is about 16735.0449058256. The cubic root of 280061728 is about 654.2613338342.

The spelling of 280061728 in words is "two hundred eighty million, sixty-one thousand, seven hundred twenty-eight".