71996920 has 16 divisors (see below), whose sum is σ = 161993160. Its totient is φ = 28798752.

The previous prime is 71996917. The next prime is 71996957. The reversal of 71996920 is 2969917.

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 in 3 ways as a sum of consecutive naturals, for example, 899922 + ... + 900001.

Almost surely, 2^71996920 is an apocalyptic number.

It is an amenable number.

71996920 is an abundant number, since it is smaller than the sum of its proper divisors (89996240).

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

71996920 is a wasteful number, since it uses less digits than its factorization.

71996920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799934 (or 1799930 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 71996920 is about 8485.0998815571. The cubic root of 71996920 is about 416.0108324349.

The spelling of 71996920 in words is "seventy-one million, nine hundred ninety-six thousand, nine hundred twenty".