284928881 has 2 divisors, whose sum is σ = 284928882. Its totient is φ = 284928880.

The previous prime is 284928841. The next prime is 284928907. The reversal of 284928881 is 188829482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283585600 + 1343281 = 16840^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 284928881 - 2⁶ = 284928817 is a prime.

It is a super-2 number, since 2×284928881² = 162368934455824322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (284928821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142464440 + 142464441.

It is an arithmetic number, because the mean of its divisors is an integer number (142464441).

Almost surely, 2^284928881 is an apocalyptic number.

It is an amenable number.

284928881 is a deficient number, since it is larger than the sum of its proper divisors (1).

284928881 is an equidigital number, since it uses as much as digits as its factorization.

284928881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 589824, while the sum is 50.

The square root of 284928881 is about 16879.8365217202. The cubic root of 284928881 is about 658.0296924299.

It can be divided in two parts, 28492 and 8881, that added together give a palindrome (37373).

The spelling of 284928881 in words is "two hundred eighty-four million, nine hundred twenty-eight thousand, eight hundred eighty-one".