285305506 has 4 divisors (see below), whose sum is σ = 427958262. Its totient is φ = 142652752.

The previous prime is 285305453. The next prime is 285305513. The reversal of 285305506 is 605503582.

It is a happy number.

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., 157728481 + 127577025 = 12559^2 + 11295^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71326375 + ... + 71326378.

Almost surely, 2^285305506 is an apocalyptic number.

285305506 is a deficient number, since it is larger than the sum of its proper divisors (142652756).

285305506 is a wasteful number, since it uses less digits than its factorization.

285305506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142652755.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 285305506 is about 16890.9888994102. The cubic root of 285305506 is about 658.3194972826.

The spelling of 285305506 in words is "two hundred eighty-five million, three hundred five thousand, five hundred six".