285109164 has 36 divisors (see below), whose sum is σ = 722074080. Its totient is φ = 94854240.

The previous prime is 285109157. The next prime is 285109169. The reversal of 285109164 is 461901582.

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

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 (285109169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12157 + ... + 26795.

Almost surely, 2^285109164 is an apocalyptic number.

It is an amenable number.

285109164 is an abundant number, since it is smaller than the sum of its proper divisors (436964916).

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

285109164 is a wasteful number, since it uses less digits than its factorization.

285109164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15190 (or 15185 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 285109164 is about 16885.1758652375. The cubic root of 285109164 is about 658.1684481723.

The spelling of 285109164 in words is "two hundred eighty-five million, one hundred nine thousand, one hundred sixty-four".