285276420 has 144 divisors (see below), whose sum is σ = 1016713152. Its totient is φ = 63832320.

The previous prime is 285276403. The next prime is 285276427. The reversal of 285276420 is 24672582.

285276420 is a `hidden beast` number, since 2 + 8 + 5 + 2 + 7 + 642 + 0 = 666.

285276420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (285276427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20199 + ... + 31281.

It is an arithmetic number, because the mean of its divisors is an integer number (7060508).

Almost surely, 2^285276420 is an apocalyptic number.

285276420 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 285276420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508356576).

285276420 is an abundant number, since it is smaller than the sum of its proper divisors (731436732).

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

285276420 is a wasteful number, since it uses less digits than its factorization.

285276420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122 (or 11117 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 285276420 is about 16890.1278858391. The cubic root of 285276420 is about 658.2971253208.

The spelling of 285276420 in words is "two hundred eighty-five million, two hundred seventy-six thousand, four hundred twenty".