284225881 has 9 divisors (see below), whose sum is σ = 297526719. Its totient is φ = 271497336.

The previous prime is 284225867. The next prime is 284225891. The reversal of 284225881 is 188522482.

The square root of 284225881 is 16859.

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

It can be written as a sum of positive squares in only one way, i.e., 278055625 + 6170256 = 16675^2 + 2484^2 .

It is not a de Polignac number, because 284225881 - 2²¹ = 282128729 is a prime.

It is a super-2 number, since 2×284225881² = 161568702860452322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284225801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 387391 + ... + 388123.

Almost surely, 2^284225881 is an apocalyptic number.

284225881 is the 16859-th square number.

284225881 is the 8430-th centered octagonal number.

It is an amenable number.

284225881 is a deficient number, since it is larger than the sum of its proper divisors (13300838).

284225881 is an frugal number, since it uses more digits than its factorization.

284225881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 756 counting only the distinct ones).

The product of its digits is 81920, while the sum is 40.

The cubic root of 284225881 is about 657.4880650534.

The spelling of 284225881 in words is "two hundred eighty-four million, two hundred twenty-five thousand, eight hundred eighty-one".