285147442 has 8 divisors (see below), whose sum is σ = 431956332. Its totient is φ = 141162000.

The previous prime is 285147439. The next prime is 285147451. The reversal of 285147442 is 244741582.

It can be written as a sum of positive squares in 2 ways, for example, as 190688481 + 94458961 = 13809^2 + 9719^2 .

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

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, 705609 + ... + 706012.

Almost surely, 2^285147442 is an apocalyptic number.

285147442 is a deficient number, since it is larger than the sum of its proper divisors (146808890).

285147442 is a wasteful number, since it uses less digits than its factorization.

285147442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411724.

The product of its digits is 71680, while the sum is 37.

The square root of 285147442 is about 16886.3093066543. The cubic root of 285147442 is about 658.1979015042.

The spelling of 285147442 in words is "two hundred eighty-five million, one hundred forty-seven thousand, four hundred forty-two".