285683255220 has 192 divisors, whose sum is σ = 908845443072. Its totient is φ = 66435264000.

The previous prime is 285683255203. The next prime is 285683255227. The reversal of 285683255220 is 22552386582.

It is a super-2 number, since 2×285683255220² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285683255220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285683255227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1651435 + ... + 1816205.

It is an arithmetic number, because the mean of its divisors is an integer number (4733570016).

Almost surely, 2^285683255220 is an apocalyptic number.

285683255220 is a gapful number since it is divisible by the number (20) 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 285683255220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454422721536).

285683255220 is an abundant number, since it is smaller than the sum of its proper divisors (623162187852).

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

285683255220 is a wasteful number, since it uses less digits than its factorization.

285683255220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164902 (or 164900 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 48.

The spelling of 285683255220 in words is "two hundred eighty-five billion, six hundred eighty-three million, two hundred fifty-five thousand, two hundred twenty".