285297946 has 4 divisors (see below), whose sum is σ = 427946922. Its totient is φ = 142648972.

The previous prime is 285297941. The next prime is 285297983. The reversal of 285297946 is 649792582.

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., 193349025 + 91948921 = 13905^2 + 9589^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285297893 and 285297902.

It is not an unprimeable number, because it can be changed into a prime (285297941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71324485 + ... + 71324488.

Almost surely, 2^285297946 is an apocalyptic number.

285297946 is a deficient number, since it is larger than the sum of its proper divisors (142648976).

285297946 is a wasteful number, since it uses less digits than its factorization.

285297946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142648975.

The product of its digits is 2177280, while the sum is 52.

The square root of 285297946 is about 16890.7651099647. The cubic root of 285297946 is about 658.3136825340.

The spelling of 285297946 in words is "two hundred eighty-five million, two hundred ninety-seven thousand, nine hundred forty-six".