71671438 has 4 divisors (see below), whose sum is σ = 107507160. Its totient is φ = 35835718.

The previous prime is 71671429. The next prime is 71671451. The reversal of 71671438 is 83417617.

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

It is a junction number, because it is equal to n+sod(n) for n = 71671397 and 71671406.

It is a congruent number.

It is an unprimeable number.

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, 17917858 + ... + 17917861.

It is an arithmetic number, because the mean of its divisors is an integer number (26876790).

Almost surely, 2^71671438 is an apocalyptic number.

71671438 is a deficient number, since it is larger than the sum of its proper divisors (35835722).

71671438 is a wasteful number, since it uses less digits than its factorization.

71671438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35835721.

The product of its digits is 28224, while the sum is 37.

The square root of 71671438 is about 8465.8985347097. The cubic root of 71671438 is about 415.3829880049.

The spelling of 71671438 in words is "seventy-one million, six hundred seventy-one thousand, four hundred thirty-eight".