285871900 has 36 divisors (see below), whose sum is σ = 626163048. Its totient is φ = 113275840.

The previous prime is 285871889. The next prime is 285871903. The reversal of 285871900 is 9178582.

It is a super-2 number, since 2×285871900² = 163445486419220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285871903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2659 + ... + 24058.

It is an arithmetic number, because the mean of its divisors is an integer number (17393418).

Almost surely, 2^285871900 is an apocalyptic number.

285871900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285871900 is an abundant number, since it is smaller than the sum of its proper divisors (340291148).

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

285871900 is a wasteful number, since it uses less digits than its factorization.

285871900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26838 (or 26831 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 285871900 is about 16907.7467452053. The cubic root of 285871900 is about 658.7548455152.

The spelling of 285871900 in words is "two hundred eighty-five million, eight hundred seventy-one thousand, nine hundred".