285089787844 has 27 divisors (see below), whose sum is σ = 526584889551. Its totient is φ = 135032920200.

The previous prime is 285089787817. The next prime is 285089787893. The reversal of 285089787844 is 448787980582.

It is a happy number.

The square root of 285089787844 is 533938.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20282619 + ... + 20296669.

Almost surely, 2^285089787844 is an apocalyptic number.

285089787844 is the 533938-th square number.

It is an amenable number.

285089787844 is a deficient number, since it is larger than the sum of its proper divisors (241495101707).

285089787844 is an frugal number, since it uses more digits than its factorization.

285089787844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28144 (or 14072 counting only the distinct ones).

The product of its (nonzero) digits is 289013760, while the sum is 70.

The spelling of 285089787844 in words is "two hundred eighty-five billion, eighty-nine million, seven hundred eighty-seven thousand, eight hundred forty-four".