71172838 has 32 divisors (see below), whose sum is σ = 121835520. Its totient is φ = 30888000.

The previous prime is 71172779. The next prime is 71172847. The reversal of 71172838 is 83827117.

It is a junction number, because it is equal to n+sod(n) for n = 71172797 and 71172806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53218 + ... + 54538.

It is an arithmetic number, because the mean of its divisors is an integer number (3807360).

Almost surely, 2^71172838 is an apocalyptic number.

71172838 is a deficient number, since it is larger than the sum of its proper divisors (50662682).

71172838 is a wasteful number, since it uses less digits than its factorization.

71172838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444.

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

The square root of 71172838 is about 8436.3995875018. The cubic root of 71172838 is about 414.4175076643.

It can be divided in two parts, 71172 and 838, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 71172838 in words is "seventy-one million, one hundred seventy-two thousand, eight hundred thirty-eight".