71689438 has 8 divisors (see below), whose sum is σ = 107589240. Its totient is φ = 35826360.

The previous prime is 71689427. The next prime is 71689441. The reversal of 71689438 is 83498617.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3628 + ... + 12511.

It is an arithmetic number, because the mean of its divisors is an integer number (13448655).

Almost surely, 2^71689438 is an apocalyptic number.

71689438 is a deficient number, since it is larger than the sum of its proper divisors (35899802).

71689438 is a wasteful number, since it uses less digits than its factorization.

71689438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18362.

The product of its digits is 290304, while the sum is 46.

The square root of 71689438 is about 8466.9615565444. The cubic root of 71689438 is about 415.4177590293.

It can be divided in two parts, 71689 and 438, that added together give a palindrome (72127).

The spelling of 71689438 in words is "seventy-one million, six hundred eighty-nine thousand, four hundred thirty-eight".