285743172 has 72 divisors (see below), whose sum is σ = 787661280. Its totient is φ = 79921920.

The previous prime is 285743113. The next prime is 285743197. The reversal of 285743172 is 271347582.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 285743172.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15904 + ... + 28712.

It is an arithmetic number, because the mean of its divisors is an integer number (10939740).

Almost surely, 2^285743172 is an apocalyptic number.

285743172 is a gapful number since it is divisible by the number (22) 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 285743172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393830640).

285743172 is an abundant number, since it is smaller than the sum of its proper divisors (501918108).

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

285743172 is a wasteful number, since it uses less digits than its factorization.

285743172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12853 (or 12838 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 285743172 is about 16903.9395408289. The cubic root of 285743172 is about 658.6559516570.

The spelling of 285743172 in words is "two hundred eighty-five million, seven hundred forty-three thousand, one hundred seventy-two".