2238454638 has 144 divisors (see below), whose sum is σ = 6005301120. Its totient is φ = 588658752.

The previous prime is 2238454627. The next prime is 2238454663. The reversal of 2238454638 is 8364548322.

2238454638 is a `hidden beast` number, since 2 + 2 + 3 + 8 + 4 + 5 + 4 + 638 = 666.

2238454638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2238454638² = 10021358332767422088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2238454593 and 2238454602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3277045 + ... + 3277727.

It is an arithmetic number, because the mean of its divisors is an integer number (41703480).

Almost surely, 2^2238454638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2238454638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3002650560).

2238454638 is an abundant number, since it is smaller than the sum of its proper divisors (3766846482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2238454638 is a wasteful number, since it uses less digits than its factorization.

2238454638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 751 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The square root of 2238454638 is about 47312.3095821796. The cubic root of 2238454638 is about 1308.1255630940.

The spelling of 2238454638 in words is "two billion, two hundred thirty-eight million, four hundred fifty-four thousand, six hundred thirty-eight".