71712838 has 4 divisors (see below), whose sum is σ = 107569260. Its totient is φ = 35856418.

The previous prime is 71712829. The next prime is 71712857. The reversal of 71712838 is 83821717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83821717 = 7 ⋅11974531.

It is a super-2 number, since 2×71712838² = 10285462268028488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71712797 and 71712806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17928208 + ... + 17928211.

It is an arithmetic number, because the mean of its divisors is an integer number (26892315).

Almost surely, 2^71712838 is an apocalyptic number.

71712838 is a deficient number, since it is larger than the sum of its proper divisors (35856422).

71712838 is a wasteful number, since it uses less digits than its factorization.

71712838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35856421.

The product of its digits is 18816, while the sum is 37.

The square root of 71712838 is about 8468.3432854367. The cubic root of 71712838 is about 415.4629526607.

The spelling of 71712838 in words is "seventy-one million, seven hundred twelve thousand, eight hundred thirty-eight".