285239232 has 84 divisors (see below), whose sum is σ = 847913976. Its totient is φ = 95074560.

The previous prime is 285239221. The next prime is 285239257. The reversal of 285239232 is 232932582.

It is a super-2 number, since 2×285239232² = 162722838943899648, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6382 + ... + 24722.

It is an arithmetic number, because the mean of its divisors is an integer number (10094214).

Almost surely, 2^285239232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285239232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423956988).

285239232 is an abundant number, since it is smaller than the sum of its proper divisors (562674744).

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

285239232 is an equidigital number, since it uses as much as digits as its factorization.

285239232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18368 (or 18346 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 285239232 is about 16889.0269701958. The cubic root of 285239232 is about 658.2685193611.

The spelling of 285239232 in words is "two hundred eighty-five million, two hundred thirty-nine thousand, two hundred thirty-two".