280252928 has 20 divisors (see below), whose sum is σ = 559959510. Its totient is φ = 140126208.

The previous prime is 280252873. The next prime is 280252937. The reversal of 280252928 is 829252082.

It can be written as a sum of positive squares in only one way, i.e., 278489344 + 1763584 = 16688^2 + 1328^2 .

It is a junction number, because it is equal to n+sod(n) for n = 280252891 and 280252900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273173 + ... + 274196.

Almost surely, 2^280252928 is an apocalyptic number.

It is an amenable number.

280252928 is a deficient number, since it is larger than the sum of its proper divisors (279706582).

280252928 is an frugal number, since it uses more digits than its factorization.

280252928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547387 (or 547371 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 280252928 is about 16740.7564942568. The cubic root of 280252928 is about 654.4101894823.

The spelling of 280252928 in words is "two hundred eighty million, two hundred fifty-two thousand, nine hundred twenty-eight".