285522740 has 24 divisors (see below), whose sum is σ = 603628200. Its totient is φ = 113441408.

The previous prime is 285522703. The next prime is 285522749. The reversal of 285522740 is 47225582.

It can be written as a sum of positive squares in 4 ways, for example, as 8832784 + 276689956 = 2972^2 + 16634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 285522740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285522749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44927 + ... + 50886.

It is an arithmetic number, because the mean of its divisors is an integer number (25151175).

Almost surely, 2^285522740 is an apocalyptic number.

285522740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285522740 is an abundant number, since it is smaller than the sum of its proper divisors (318105460).

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

285522740 is a wasteful number, since it uses less digits than its factorization.

285522740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95971 (or 95969 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 285522740 is about 16897.4181459772. The cubic root of 285522740 is about 658.4865382192.

The spelling of 285522740 in words is "two hundred eighty-five million, five hundred twenty-two thousand, seven hundred forty".