285257074 has 4 divisors (see below), whose sum is σ = 427885614. Its totient is φ = 142628536.

The previous prime is 285257069. The next prime is 285257083. The reversal of 285257074 is 470752582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470752582 = 2 ⋅235376291.

It can be written as a sum of positive squares in only one way, i.e., 251698225 + 33558849 = 15865^2 + 5793^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71314267 + ... + 71314270.

Almost surely, 2^285257074 is an apocalyptic number.

285257074 is a deficient number, since it is larger than the sum of its proper divisors (142628540).

285257074 is a wasteful number, since it uses less digits than its factorization.

285257074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142628539.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 285257074 is about 16889.5551747226. Note that the first 3 decimals coincide. The cubic root of 285257074 is about 658.2822441936.

The spelling of 285257074 in words is "two hundred eighty-five million, two hundred fifty-seven thousand, seventy-four".