285397768 has 32 divisors (see below), whose sum is σ = 567385560. Its totient is φ = 134118400.

The previous prime is 285397759. The next prime is 285397789. The reversal of 285397768 is 867793582.

It can be written as a sum of positive squares in 4 ways, for example, as 206152164 + 79245604 = 14358^2 + 8902^2 .

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, 176130 + ... + 177742.

Almost surely, 2^285397768 is an apocalyptic number.

It is an amenable number.

285397768 is a deficient number, since it is larger than the sum of its proper divisors (281987792).

285397768 is a wasteful number, since it uses less digits than its factorization.

285397768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937 (or 2933 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The square root of 285397768 is about 16893.7197798472. The cubic root of 285397768 is about 658.3904520150.

The spelling of 285397768 in words is "two hundred eighty-five million, three hundred ninety-seven thousand, seven hundred sixty-eight".