285785982 has 24 divisors (see below), whose sum is σ = 642137496. Its totient is φ = 95261832.

The previous prime is 285785957. The next prime is 285785987. The reversal of 285785982 is 289587582.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285785987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293533 + ... + 294504.

It is an arithmetic number, because the mean of its divisors is an integer number (26755729).

Almost surely, 2^285785982 is an apocalyptic number.

285785982 is an abundant number, since it is smaller than the sum of its proper divisors (356351514).

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

285785982 is an equidigital number, since it uses as much as digits as its factorization.

285785982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588054 (or 588042 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The square root of 285785982 is about 16905.2057662721. The cubic root of 285785982 is about 658.6888432604.

The spelling of 285785982 in words is "two hundred eighty-five million, seven hundred eighty-five thousand, nine hundred eighty-two".