280328255 has 8 divisors (see below), whose sum is σ = 351019872. Its totient is φ = 214511968.

The previous prime is 280328233. The next prime is 280328287. The reversal of 280328255 is 552823082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280328255 - 2¹² = 280324159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218704 + ... + 1218933.

It is an arithmetic number, because the mean of its divisors is an integer number (43877484).

Almost surely, 2^280328255 is an apocalyptic number.

280328255 is a deficient number, since it is larger than the sum of its proper divisors (70691617).

280328255 is a wasteful number, since it uses less digits than its factorization.

280328255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437665.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 280328255 is about 16743.0061518235. The cubic root of 280328255 is about 654.4688155014.

The spelling of 280328255 in words is "two hundred eighty million, three hundred twenty-eight thousand, two hundred fifty-five".