71889688 has 32 divisors (see below), whose sum is σ = 146235600. Its totient is φ = 32934528.

The previous prime is 71889667. The next prime is 71889709. The reversal of 71889688 is 88698817.

It is an interprime number because it is at equal distance from previous prime (71889667) and next prime (71889709).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11970 + ... + 16942.

Almost surely, 2^71889688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71889688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73117800).

71889688 is an abundant number, since it is smaller than the sum of its proper divisors (74345912).

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

71889688 is a wasteful number, since it uses less digits than its factorization.

71889688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131 (or 5127 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 55.

The square root of 71889688 is about 8478.7786856363. The cubic root of 71889688 is about 415.8041947107.

The spelling of 71889688 in words is "seventy-one million, eight hundred eighty-nine thousand, six hundred eighty-eight".