284705644 has 12 divisors (see below), whose sum is σ = 515415600. Its totient is φ = 137444048.

The previous prime is 284705627. The next prime is 284705657. The reversal of 284705644 is 446507482.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 284705597 and 284705606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1227064 + ... + 1227295.

It is an arithmetic number, because the mean of its divisors is an integer number (42951300).

Almost surely, 2^284705644 is an apocalyptic number.

It is an amenable number.

284705644 is a deficient number, since it is larger than the sum of its proper divisors (230709956).

284705644 is a wasteful number, since it uses less digits than its factorization.

284705644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454392 (or 2454390 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The square root of 284705644 is about 16873.2226915904. Note that the first 3 decimals coincide. The cubic root of 284705644 is about 657.8577957864.

The spelling of 284705644 in words is "two hundred eighty-four million, seven hundred five thousand, six hundred forty-four".