280256164 has 12 divisors (see below), whose sum is σ = 491524684. Its totient is φ = 139820544.

The previous prime is 280256153. The next prime is 280256189. The reversal of 280256164 is 461652082.

It can be written as a sum of positive squares in 2 ways, for example, as 115390564 + 164865600 = 10742^2 + 12840^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74829 + ... + 78484.

Almost surely, 2^280256164 is an apocalyptic number.

It is an amenable number.

280256164 is a deficient number, since it is larger than the sum of its proper divisors (211268520).

280256164 is a wasteful number, since it uses less digits than its factorization.

280256164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153774 (or 153772 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 280256164 is about 16740.8531443293. The cubic root of 280256164 is about 654.4127082347.

The spelling of 280256164 in words is "two hundred eighty million, two hundred fifty-six thousand, one hundred sixty-four".