285163788 has 96 divisors (see below), whose sum is σ = 838114816. Its totient is φ = 73446912.

The previous prime is 285163787. The next prime is 285163793. The reversal of 285163788 is 887361582.

It is not an unprimeable number, because it can be changed into a prime (285163783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43920 + ... + 49992.

Almost surely, 2^285163788 is an apocalyptic number.

285163788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285163788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419057408).

285163788 is an abundant number, since it is smaller than the sum of its proper divisors (552951028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285163788 is a wasteful number, since it uses less digits than its factorization.

285163788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143 (or 6141 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 285163788 is about 16886.7933012754. The cubic root of 285163788 is about 658.2104782694.

The spelling of 285163788 in words is "two hundred eighty-five million, one hundred sixty-three thousand, seven hundred eighty-eight".