1238838711 has 8 divisors (see below), whose sum is σ = 1801947264. Its totient is φ = 750811320.

The previous prime is 1238838697. The next prime is 1238838763. The reversal of 1238838711 is 1178388321.

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

It is not a de Polignac number, because 1238838711 - 2⁷ = 1238838583 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238838011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18770251 + ... + 18770316.

It is an arithmetic number, because the mean of its divisors is an integer number (225243408).

Almost surely, 2^1238838711 is an apocalyptic number.

1238838711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1238838711 is a deficient number, since it is larger than the sum of its proper divisors (563108553).

1238838711 is a wasteful number, since it uses less digits than its factorization.

1238838711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37540581.

The product of its digits is 64512, while the sum is 42.

The square root of 1238838711 is about 35197.1406651165. The cubic root of 1238838711 is about 1074.0015856397.

The spelling of 1238838711 in words is "one billion, two hundred thirty-eight million, eight hundred thirty-eight thousand, seven hundred eleven".