285471984 has 80 divisors (see below), whose sum is σ = 860802048. Its totient is φ = 79823616.

The previous prime is 285471919. The next prime is 285472003. The reversal of 285471984 is 489174582.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6754 + ... + 24830.

Almost surely, 2^285471984 is an apocalyptic number.

285471984 is a gapful number since it is divisible by the number (24) 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 285471984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430401024).

285471984 is an abundant number, since it is smaller than the sum of its proper divisors (575330064).

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

285471984 is a wasteful number, since it uses less digits than its factorization.

285471984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142 (or 18136 counting only the distinct ones).

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

The square root of 285471984 is about 16895.9161929740. The cubic root of 285471984 is about 658.4475172486.

The spelling of 285471984 in words is "two hundred eighty-five million, four hundred seventy-one thousand, nine hundred eighty-four".