285445680 has 160 divisors (see below), whose sum is σ = 959938560. Its totient is φ = 69749760.

The previous prime is 285445669. The next prime is 285445681. The reversal of 285445680 is 86544582.

It is not an unprimeable number, because it can be changed into a prime (285445681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 595681 + ... + 596159.

It is an arithmetic number, because the mean of its divisors is an integer number (5999616).

Almost surely, 2^285445680 is an apocalyptic number.

285445680 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 285445680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479969280).

285445680 is an abundant number, since it is smaller than the sum of its proper divisors (674492880).

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

285445680 is a wasteful number, since it uses less digits than its factorization.

285445680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The square root of 285445680 is about 16895.1377620900. The cubic root of 285445680 is about 658.4272930393.

The spelling of 285445680 in words is "two hundred eighty-five million, four hundred forty-five thousand, six hundred eighty".