285213406 has 8 divisors (see below), whose sum is σ = 428294520. Its totient is φ = 142448568.

The previous prime is 285213391. The next prime is 285213407. The reversal of 285213406 is 604312582.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285213407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76801 + ... + 80428.

It is an arithmetic number, because the mean of its divisors is an integer number (53536815).

Almost surely, 2^285213406 is an apocalyptic number.

285213406 is a deficient number, since it is larger than the sum of its proper divisors (143081114).

285213406 is a wasteful number, since it uses less digits than its factorization.

285213406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158138.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 285213406 is about 16888.2623736132. The cubic root of 285213406 is about 658.2486518792.

Adding to 285213406 its reverse (604312582), we get a palindrome (889525988).

The spelling of 285213406 in words is "two hundred eighty-five million, two hundred thirteen thousand, four hundred six".