285486780 has 96 divisors (see below), whose sum is σ = 890991360. Its totient is φ = 67875840.

The previous prime is 285486767. The next prime is 285486821. The reversal of 285486780 is 87684582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12015 + ... + 26745.

It is an arithmetic number, because the mean of its divisors is an integer number (9281160).

Almost surely, 2^285486780 is an apocalyptic number.

285486780 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 285486780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445495680).

285486780 is an abundant number, since it is smaller than the sum of its proper divisors (605504580).

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

285486780 is a wasteful number, since it uses less digits than its factorization.

285486780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14779 (or 14777 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 285486780 is about 16896.3540445861. The cubic root of 285486780 is about 658.4588928204.

The spelling of 285486780 in words is "two hundred eighty-five million, four hundred eighty-six thousand, seven hundred eighty".