71672312 has 16 divisors (see below), whose sum is σ = 136392360. Its totient is φ = 35301024.

The previous prime is 71672281. The next prime is 71672317. The reversal of 71672312 is 21327617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71672317) 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, 66323 + ... + 67394.

Almost surely, 2^71672312 is an apocalyptic number.

It is an amenable number.

71672312 is a deficient number, since it is larger than the sum of its proper divisors (64720048).

71672312 is a wasteful number, since it uses less digits than its factorization.

71672312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133790 (or 133786 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 71672312 is about 8465.9501534087. The cubic root of 71672312 is about 415.3846764658.

Adding to 71672312 its reverse (21327617), we get a palindrome (92999929).

The spelling of 71672312 in words is "seventy-one million, six hundred seventy-two thousand, three hundred twelve".