71720108 has 12 divisors (see below), whose sum is σ = 126414120. Its totient is φ = 35601792.

The previous prime is 71720101. The next prime is 71720113. The reversal of 71720108 is 80102717.

It is not an unprimeable number, because it can be changed into a prime (71720101) 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, 63941 + ... + 65052.

It is an arithmetic number, because the mean of its divisors is an integer number (10534510).

Almost surely, 2^71720108 is an apocalyptic number.

It is an amenable number.

71720108 is a deficient number, since it is larger than the sum of its proper divisors (54694012).

71720108 is a wasteful number, since it uses less digits than its factorization.

71720108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129136 (or 129134 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 71720108 is about 8468.7725202653. The cubic root of 71720108 is about 415.4769915863.

The spelling of 71720108 in words is "seventy-one million, seven hundred twenty thousand, one hundred eight".