280256732 has 12 divisors (see below), whose sum is σ = 560513520. Its totient is φ = 120110016.

The previous prime is 280256677. The next prime is 280256773. The reversal of 280256732 is 237652082.

280256732 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 280256692 and 280256701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5004557 + ... + 5004612.

It is an arithmetic number, because the mean of its divisors is an integer number (46709460).

Almost surely, 2^280256732 is an apocalyptic number.

It is an amenable number.

280256732 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

280256732 is a wasteful number, since it uses less digits than its factorization.

280256732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009180 (or 10009178 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 280256732 is about 16740.8701088086. The cubic root of 280256732 is about 654.4131503376.

The spelling of 280256732 in words is "two hundred eighty million, two hundred fifty-six thousand, seven hundred thirty-two".