284450488921 has 27 divisors (see below), whose sum is σ = 301128470461. Its totient is φ = 268683388064.

The previous prime is 284450488919. The next prime is 284450488957. The reversal of 284450488921 is 129884054482.

The square root of 284450488921 is 533339.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17847624025 + 266602864896 = 133595^2 + 516336^2 .

It is not a de Polignac number, because 284450488921 - 2¹ = 284450488919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284450488991) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 819741870 + ... + 819742216.

Almost surely, 2^284450488921 is an apocalyptic number.

284450488921 is the 533339-th square number.

284450488921 is the 266670-th centered octagonal number.

It is an amenable number.

284450488921 is a deficient number, since it is larger than the sum of its proper divisors (16677981540).

284450488921 is an frugal number, since it uses more digits than its factorization.

284450488921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 55.

The spelling of 284450488921 in words is "two hundred eighty-four billion, four hundred fifty million, four hundred eighty-eight thousand, nine hundred twenty-one".