285639252 has 24 divisors (see below), whose sum is σ = 667518432. Its totient is φ = 95066400.

The previous prime is 285639197. The next prime is 285639259. The reversal of 285639252 is 252936582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285639259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10074 + ... + 25937.

It is an arithmetic number, because the mean of its divisors is an integer number (27813268).

Almost surely, 2^285639252 is an apocalyptic number.

It is an amenable number.

285639252 is an abundant number, since it is smaller than the sum of its proper divisors (381879180).

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

285639252 is a wasteful number, since it uses less digits than its factorization.

285639252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36679 (or 36677 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 285639252 is about 16900.8654216286. The cubic root of 285639252 is about 658.5760946005.

The spelling of 285639252 in words is "two hundred eighty-five million, six hundred thirty-nine thousand, two hundred fifty-two".