71390438 has 8 divisors (see below), whose sum is σ = 122383632. Its totient is φ = 30595896.

The previous prime is 71390401. The next prime is 71390441. The reversal of 71390438 is 83409317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 71390398 and 71390407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2549645 + ... + 2549672.

It is an arithmetic number, because the mean of its divisors is an integer number (15297954).

Almost surely, 2^71390438 is an apocalyptic number.

71390438 is a deficient number, since it is larger than the sum of its proper divisors (50993194).

71390438 is a wasteful number, since it uses less digits than its factorization.

71390438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099326.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 71390438 is about 8449.2862420444. The cubic root of 71390438 is about 414.8394172343.

The spelling of 71390438 in words is "seventy-one million, three hundred ninety thousand, four hundred thirty-eight".