285504836 has 6 divisors (see below), whose sum is σ = 499633470. Its totient is φ = 142752416.

The previous prime is 285504829. The next prime is 285504883. The reversal of 285504836 is 638405582.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 139240000 = 12094^2 + 11800^2 .

It is a super-2 number, since 2×285504836² = 163026022758773792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285504793 and 285504802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35688101 + ... + 35688108.

It is an arithmetic number, because the mean of its divisors is an integer number (83272245).

Almost surely, 2^285504836 is an apocalyptic number.

It is an amenable number.

285504836 is a deficient number, since it is larger than the sum of its proper divisors (214128634).

285504836 is a wasteful number, since it uses less digits than its factorization.

285504836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71376213 (or 71376211 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 285504836 is about 16896.8883525932. Note that the first 3 decimals coincide. The cubic root of 285504836 is about 658.4727742374.

The spelling of 285504836 in words is "two hundred eighty-five million, five hundred four thousand, eight hundred thirty-six".