280460872 has 8 divisors (see below), whose sum is σ = 525864150. Its totient is φ = 140230432.

The previous prime is 280460867. The next prime is 280460879. The reversal of 280460872 is 278064082.

It can be written as a sum of positive squares in only one way, i.e., 188952516 + 91508356 = 13746^2 + 9566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (280460879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17528797 + ... + 17528812.

Almost surely, 2^280460872 is an apocalyptic number.

It is an amenable number.

280460872 is a deficient number, since it is larger than the sum of its proper divisors (245403278).

280460872 is a wasteful number, since it uses less digits than its factorization.

280460872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35057615 (or 35057611 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 280460872 is about 16746.9660535871. The cubic root of 280460872 is about 654.5720040624.

The spelling of 280460872 in words is "two hundred eighty million, four hundred sixty thousand, eight hundred seventy-two".