285343285890 has 288 divisors, whose sum is σ = 793635278400. Its totient is φ = 65612771328.

The previous prime is 285343285889. The next prime is 285343285943. The reversal of 285343285890 is 98582343582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 285343285890.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 218318617 + ... + 218319923.

It is an arithmetic number, because the mean of its divisors is an integer number (2755678050).

Almost surely, 2^285343285890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285343285890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396817639200).

285343285890 is an abundant number, since it is smaller than the sum of its proper divisors (508291992510).

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

285343285890 is a wasteful number, since it uses less digits than its factorization.

285343285890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 285343285890 in words is "two hundred eighty-five billion, three hundred forty-three million, two hundred eighty-five thousand, eight hundred ninety".