71999992 has 16 divisors (see below), whose sum is σ = 135090000. Its totient is φ = 35976000.

The previous prime is 71999989. The next prime is 71999999. The reversal of 71999992 is 29999917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71999999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22492 + ... + 25492.

It is an arithmetic number, because the mean of its divisors is an integer number (8443125).

Almost surely, 2^71999992 is an apocalyptic number.

It is an amenable number.

71999992 is a deficient number, since it is larger than the sum of its proper divisors (63090008).

71999992 is a wasteful number, since it uses less digits than its factorization.

71999992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006 (or 6002 counting only the distinct ones).

The product of its digits is 826686, while the sum is 55.

The square root of 71999992 is about 8485.2809028340. The cubic root of 71999992 is about 416.0167492024.

The spelling of 71999992 in words is "seventy-one million, nine hundred ninety-nine thousand, nine hundred ninety-two".