71971792 has 20 divisors (see below), whose sum is σ = 140829156. Its totient is φ = 35628800.

The previous prime is 71971787. The next prime is 71971811. The reversal of 71971792 is 29717917.

It can be written as a sum of positive squares in 2 ways, for example, as 70963776 + 1008016 = 8424^2 + 1004^2 .

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, 20653 + ... + 23884.

Almost surely, 2^71971792 is an apocalyptic number.

It is an amenable number.

71971792 is a deficient number, since it is larger than the sum of its proper divisors (68857364).

71971792 is a wasteful number, since it uses less digits than its factorization.

71971792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44646 (or 44640 counting only the distinct ones).

The product of its digits is 55566, while the sum is 43.

The square root of 71971792 is about 8483.6190390658. The cubic root of 71971792 is about 415.9624288061.

The spelling of 71971792 in words is "seventy-one million, nine hundred seventy-one thousand, seven hundred ninety-two".