285404416 has 72 divisors (see below), whose sum is σ = 636207264. Its totient is φ = 126658560.

The previous prime is 285404393. The next prime is 285404429. The reversal of 285404416 is 614404582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119910 + ... + 122266.

It is an arithmetic number, because the mean of its divisors is an integer number (8836212).

Almost surely, 2^285404416 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 285404416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318103632).

285404416 is an abundant number, since it is smaller than the sum of its proper divisors (350802848).

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

285404416 is a wasteful number, since it uses less digits than its factorization.

285404416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 285404416 is about 16893.9165382098. The cubic root of 285404416 is about 658.3955641150.

Adding to 285404416 its reverse (614404582), we get a palindrome (899808998).

The spelling of 285404416 in words is "two hundred eighty-five million, four hundred four thousand, four hundred sixteen".