285489100 has 36 divisors (see below), whose sum is σ = 667169104. Its totient is φ = 105410880.

The previous prime is 285489091. The next prime is 285489107. The reversal of 285489100 is 1984582.

It is a self number, because there is not a number n which added to its sum of digits gives 285489100.

It is not an unprimeable number, because it can be changed into a prime (285489107) 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, 108504 + ... + 111103.

Almost surely, 2^285489100 is an apocalyptic number.

285489100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285489100 is an abundant number, since it is smaller than the sum of its proper divisors (381680004).

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

285489100 is a wasteful number, since it uses less digits than its factorization.

285489100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219634 (or 219627 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 285489100 is about 16896.4226983110. The cubic root of 285489100 is about 658.4606764646.

The spelling of 285489100 in words is "two hundred eighty-five million, four hundred eighty-nine thousand, one hundred".