67871538 has 48 divisors (see below), whose sum is σ = 168994176. Its totient is φ = 19284480.

The previous prime is 67871519. The next prime is 67871549. The reversal of 67871538 is 83517876.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67871493 and 67871502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22923 + ... + 25713.

It is an arithmetic number, because the mean of its divisors is an integer number (3520712).

Almost surely, 2^67871538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67871538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84497088).

67871538 is an abundant number, since it is smaller than the sum of its proper divisors (101122638).

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

67871538 is a wasteful number, since it uses less digits than its factorization.

67871538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999 (or 2996 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 67871538 is about 8238.4184161767. The cubic root of 67871538 is about 407.9083199426.

The spelling of 67871538 in words is "sixty-seven million, eight hundred seventy-one thousand, five hundred thirty-eight".