1238888871 has 72 divisors (see below), whose sum is σ = 2080896720. Its totient is φ = 727911360.

The previous prime is 1238888851. The next prime is 1238888879. The reversal of 1238888871 is 1788888321.

It is not a de Polignac number, because 1238888871 - 2¹³ = 1238880679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238888879) 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 71 ways as a sum of consecutive naturals, for example, 4472385 + ... + 4472661.

Almost surely, 2^1238888871 is an apocalyptic number.

1238888871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1238888871 is a deficient number, since it is larger than the sum of its proper divisors (842007849).

1238888871 is a wasteful number, since it uses less digits than its factorization.

1238888871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 328 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 54.

The square root of 1238888871 is about 35197.8532157858. The cubic root of 1238888871 is about 1074.0160807180.

It can be divided in two parts, 12 and 38888871, that added together give a palindrome (38888883).

The spelling of 1238888871 in words is "one billion, two hundred thirty-eight million, eight hundred eighty-eight thousand, eight hundred seventy-one".