2238449881 has 8 divisors (see below), whose sum is σ = 2270470664. Its totient is φ = 2206465920.

The previous prime is 2238449849. The next prime is 2238449897. The reversal of 2238449881 is 1889448322.

It can be written as a sum of positive squares in 4 ways, for example, as 2673225 + 2235776656 = 1635^2 + 47284^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2238449881 - 2⁵ = 2238449849 is a prime.

It is a super-2 number, since 2×2238449881² = 10021315739497828322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2238449281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 127615 + ... + 144091.

It is an arithmetic number, because the mean of its divisors is an integer number (283808833).

Almost surely, 2^2238449881 is an apocalyptic number.

It is an amenable number.

2238449881 is a deficient number, since it is larger than the sum of its proper divisors (32020783).

2238449881 is a wasteful number, since it uses less digits than its factorization.

2238449881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18411.

The product of its digits is 884736, while the sum is 49.

The square root of 2238449881 is about 47312.2593098237. The cubic root of 2238449881 is about 1308.1246364491.

The spelling of 2238449881 in words is "two billion, two hundred thirty-eight million, four hundred forty-nine thousand, eight hundred eighty-one".