285873816 has 64 divisors (see below), whose sum is σ = 749952000. Its totient is φ = 90691200.

The previous prime is 285873799. The next prime is 285873817. The reversal of 285873816 is 618378582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285873817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42235 + ... + 48533.

It is an arithmetic number, because the mean of its divisors is an integer number (11718000).

Almost surely, 2^285873816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285873816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374976000).

285873816 is an abundant number, since it is smaller than the sum of its proper divisors (464078184).

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

285873816 is a wasteful number, since it uses less digits than its factorization.

285873816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400 (or 6396 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 285873816 is about 16907.8034055285. The cubic root of 285873816 is about 658.7563172367.

The spelling of 285873816 in words is "two hundred eighty-five million, eight hundred seventy-three thousand, eight hundred sixteen".