2238001981838 has 16 divisors (see below), whose sum is σ = 3838411436640. Its totient is φ = 958684553856.

The previous prime is 2238001981837. The next prime is 2238001981841. The reversal of 2238001981838 is 8381891008322.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2238001981838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2238001981837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38232431 + ... + 38290922.

It is an arithmetic number, because the mean of its divisors is an integer number (239900714790).

Almost surely, 2^{2238001981838} is an apocalyptic number.

2238001981838 is a deficient number, since it is larger than the sum of its proper divisors (1600409454802).

2238001981838 is a wasteful number, since it uses less digits than its factorization.

2238001981838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76525451.

The product of its (nonzero) digits is 1327104, while the sum is 53.

The spelling of 2238001981838 in words is "two trillion, two hundred thirty-eight billion, one million, nine hundred eighty-one thousand, eight hundred thirty-eight".