71738 has 4 divisors (see below), whose sum is σ = 107610. Its totient is φ = 35868.

The previous prime is 71719. The next prime is 71741. The reversal of 71738 is 83717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47089 + 24649 = 217^2 + 157^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17933 + ... + 17936.

2⁷¹⁷³⁸ is an apocalyptic number.

71738 is a deficient number, since it is larger than the sum of its proper divisors (35872).

71738 is a wasteful number, since it uses less digits than its factorization.

71738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35871.

The product of its digits is 1176, while the sum is 26.

The square root of 71738 is about 267.8395041811. The cubic root of 71738 is about 41.5511538366.

The spelling of 71738 in words is "seventy-one thousand, seven hundred thirty-eight".