2238861649 has 4 divisors (see below), whose sum is σ = 2238993460. Its totient is φ = 2238729840.

The previous prime is 2238861629. The next prime is 2238861707. The reversal of 2238861649 is 9461688322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1602561024 + 636300625 = 40032^2 + 25225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2238861649 - 2⁵ = 2238861617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2238861629) 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 3 ways as a sum of consecutive naturals, for example, 35862 + ... + 75919.

It is an arithmetic number, because the mean of its divisors is an integer number (559748365).

Almost surely, 2^2238861649 is an apocalyptic number.

It is an amenable number.

2238861649 is a deficient number, since it is larger than the sum of its proper divisors (131811).

2238861649 is a wasteful number, since it uses less digits than its factorization.

2238861649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131810.

The product of its digits is 995328, while the sum is 49.

The square root of 2238861649 is about 47316.6107091368. The cubic root of 2238861649 is about 1308.2048423757.

The spelling of 2238861649 in words is "two billion, two hundred thirty-eight million, eight hundred sixty-one thousand, six hundred forty-nine".