285423218 has 4 divisors (see below), whose sum is σ = 428134830. Its totient is φ = 142711608.

The previous prime is 285423163. The next prime is 285423227. The reversal of 285423218 is 812324582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 273472369 + 11950849 = 16537^2 + 3457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71355803 + ... + 71355806.

Almost surely, 2^285423218 is an apocalyptic number.

285423218 is a deficient number, since it is larger than the sum of its proper divisors (142711612).

285423218 is a wasteful number, since it uses less digits than its factorization.

285423218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142711611.

The product of its digits is 30720, while the sum is 35.

The square root of 285423218 is about 16894.4730015470. The cubic root of 285423218 is about 658.4100218235.

The spelling of 285423218 in words is "two hundred eighty-five million, four hundred twenty-three thousand, two hundred eighteen".