71439916 has 24 divisors (see below), whose sum is σ = 134247456. Its totient is φ = 33143040.

The previous prime is 71439881. The next prime is 71439947. The reversal of 71439916 is 61993417.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571 + ... + 12226.

It is an arithmetic number, because the mean of its divisors is an integer number (5593644).

Almost surely, 2^71439916 is an apocalyptic number.

It is an amenable number.

71439916 is a deficient number, since it is larger than the sum of its proper divisors (62807540).

71439916 is a wasteful number, since it uses less digits than its factorization.

71439916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14889 (or 14887 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 71439916 is about 8452.2136745352. The cubic root of 71439916 is about 414.9352315819.

The spelling of 71439916 in words is "seventy-one million, four hundred thirty-nine thousand, nine hundred sixteen".