285722250 has 128 divisors (see below), whose sum is σ = 792529920. Its totient is φ = 67976000.

The previous prime is 285722249. The next prime is 285722263. The reversal of 285722250 is 52227582.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 486457 + ... + 487043.

It is an arithmetic number, because the mean of its divisors is an integer number (6191640).

Almost surely, 2^285722250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285722250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396264960).

285722250 is an abundant number, since it is smaller than the sum of its proper divisors (506807670).

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

285722250 is a wasteful number, since it uses less digits than its factorization.

285722250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 285722250 is about 16903.3206796771. The cubic root of 285722250 is about 658.6398757568.

The spelling of 285722250 in words is "two hundred eighty-five million, seven hundred twenty-two thousand, two hundred fifty".