285059988 has 36 divisors (see below), whose sum is σ = 740046580. Its totient is φ = 92451456.

The previous prime is 285059987. The next prime is 285059989. The reversal of 285059988 is 889950582.

It is an interprime number because it is at equal distance from previous prime (285059987) and next prime (285059989).

It can be written as a sum of positive squares in 2 ways, for example, as 137874564 + 147185424 = 11742^2 + 12132^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285059981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105673 + ... + 108336.

Almost surely, 2^285059988 is an apocalyptic number.

It is an amenable number.

285059988 is an abundant number, since it is smaller than the sum of its proper divisors (454986592).

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

285059988 is a wasteful number, since it uses less digits than its factorization.

285059988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214056 (or 214051 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The square root of 285059988 is about 16883.7196138766. The cubic root of 285059988 is about 658.1306054127.

The spelling of 285059988 in words is "two hundred eighty-five million, fifty-nine thousand, nine hundred eighty-eight".