285680900 has 18 divisors (see below), whose sum is σ = 619927770. Its totient is φ = 114272320.

The previous prime is 285680893. The next prime is 285680939. The reversal of 285680900 is 9086582.

It can be written as a sum of positive squares in 3 ways, for example, as 678976 + 285001924 = 824^2 + 16882^2 .

It is a super-2 number, since 2×285680900² = 163227153249620000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428305 + ... + 1428504.

Almost surely, 2^285680900 is an apocalyptic number.

285680900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285680900 is an abundant number, since it is smaller than the sum of its proper divisors (334246870).

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

285680900 is a wasteful number, since it uses less digits than its factorization.

285680900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856823 (or 2856816 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 285680900 is about 16902.0975029728. The cubic root of 285680900 is about 658.6081012243.

The spelling of 285680900 in words is "two hundred eighty-five million, six hundred eighty thousand, nine hundred".