71873638 has 8 divisors (see below), whose sum is σ = 107906040. Its totient is φ = 35904960.

The previous prime is 71873621. The next prime is 71873653. The reversal of 71873638 is 83637817.

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

It is a junction number, because it is equal to n+sod(n) for n = 71873594 and 71873603.

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 3 ways as a sum of consecutive naturals, for example, 13003 + ... + 17686.

It is an arithmetic number, because the mean of its divisors is an integer number (13488255).

Almost surely, 2^71873638 is an apocalyptic number.

71873638 is a deficient number, since it is larger than the sum of its proper divisors (36032402).

71873638 is a wasteful number, since it uses less digits than its factorization.

71873638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31862.

The product of its digits is 169344, while the sum is 43.

The square root of 71873638 is about 8477.8321521483. The cubic root of 71873638 is about 415.7732484363.

The spelling of 71873638 in words is "seventy-one million, eight hundred seventy-three thousand, six hundred thirty-eight".