284891216 has 10 divisors (see below), whose sum is σ = 551976762. Its totient is φ = 142445600.

The previous prime is 284891213. The next prime is 284891221. The reversal of 284891216 is 612198482.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 92236816 = 13880^2 + 9604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284891213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8902835 + ... + 8902866.

Almost surely, 2^284891216 is an apocalyptic number.

It is an amenable number.

284891216 is a deficient number, since it is larger than the sum of its proper divisors (267085546).

284891216 is a wasteful number, since it uses less digits than its factorization.

284891216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17805709 (or 17805703 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 284891216 is about 16878.7208046108. The cubic root of 284891216 is about 658.0006959771. Note that the first 3 decimals are identical.

The spelling of 284891216 in words is "two hundred eighty-four million, eight hundred ninety-one thousand, two hundred sixteen".