285208020 has 48 divisors (see below), whose sum is σ = 887315520. Its totient is φ = 76055328.

The previous prime is 285207977. The next prime is 285208043. The reversal of 285208020 is 20802582.

It is a super-2 number, since 2×285208020² = 162687229344640800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263542 + ... + 264621.

It is an arithmetic number, because the mean of its divisors is an integer number (18485740).

Almost surely, 2^285208020 is an apocalyptic number.

285208020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285208020 is an abundant number, since it is smaller than the sum of its proper divisors (602107500).

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

285208020 is a wasteful number, since it uses less digits than its factorization.

285208020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528181 (or 528173 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 285208020 is about 16888.1029129977. The cubic root of 285208020 is about 658.2445083741.

The spelling of 285208020 in words is "two hundred eighty-five million, two hundred eight thousand, twenty".