71039420 has 24 divisors (see below), whose sum is σ = 149733024. Its totient is φ = 28310976.

The previous prime is 71039411. The next prime is 71039431. The reversal of 71039420 is 2493017.

It is a self number, because there is not a number n which added to its sum of digits gives 71039420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872 + ... + 11951.

It is an arithmetic number, because the mean of its divisors is an integer number (6238876).

Almost surely, 2^71039420 is an apocalyptic number.

It is an amenable number.

71039420 is an abundant number, since it is smaller than the sum of its proper divisors (78693604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71039420 is a wasteful number, since it uses less digits than its factorization.

71039420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13109 (or 13107 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 71039420 is about 8428.4885952346. The cubic root of 71039420 is about 414.1583950530.

The spelling of 71039420 in words is "seventy-one million, thirty-nine thousand, four hundred twenty".