285129732 has 96 divisors (see below), whose sum is σ = 725401600. Its totient is φ = 86873472.

The previous prime is 285129709. The next prime is 285129773. The reversal of 285129732 is 237921582.

It is a super-3 number, since 3×285129732³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1244994 + ... + 1245222.

Almost surely, 2^285129732 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 285129732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362700800).

285129732 is an abundant number, since it is smaller than the sum of its proper divisors (440271868).

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

285129732 is a wasteful number, since it uses less digits than its factorization.

285129732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 285129732 is about 16885.7849092069. The cubic root of 285129732 is about 658.1842747221.

The spelling of 285129732 in words is "two hundred eighty-five million, one hundred twenty-nine thousand, seven hundred thirty-two".