285231956 has 12 divisors (see below), whose sum is σ = 499279200. Its totient is φ = 142580760.

The previous prime is 285231953. The next prime is 285231959. The reversal of 285231956 is 659132582.

It is an interprime number because it is at equal distance from previous prime (285231953) and next prime (285231959).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285231953) 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, 19595 + ... + 30893.

It is an arithmetic number, because the mean of its divisors is an integer number (41606600).

Almost surely, 2^285231956 is an apocalyptic number.

It is an amenable number.

285231956 is a deficient number, since it is larger than the sum of its proper divisors (214047244).

285231956 is a wasteful number, since it uses less digits than its factorization.

285231956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17614 (or 17612 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 285231956 is about 16888.8115626885. The cubic root of 285231956 is about 658.2629221852.

The spelling of 285231956 in words is "two hundred eighty-five million, two hundred thirty-one thousand, nine hundred fifty-six".