71384438 has 4 divisors (see below), whose sum is σ = 107076660. Its totient is φ = 35692218.

The previous prime is 71384431. The next prime is 71384447. The reversal of 71384438 is 83448317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83448317 = 5651 ⋅14767.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71384431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17846108 + ... + 17846111.

It is an arithmetic number, because the mean of its divisors is an integer number (26769165).

Almost surely, 2^71384438 is an apocalyptic number.

71384438 is a deficient number, since it is larger than the sum of its proper divisors (35692222).

71384438 is a wasteful number, since it uses less digits than its factorization.

71384438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35692221.

The product of its digits is 64512, while the sum is 38.

The square root of 71384438 is about 8448.9311750067. The cubic root of 71384438 is about 414.8277952006.

The spelling of 71384438 in words is "seventy-one million, three hundred eighty-four thousand, four hundred thirty-eight".