71701720 has 16 divisors (see below), whose sum is σ = 161328960. Its totient is φ = 28680672.

The previous prime is 71701711. The next prime is 71701723. The reversal of 71701720 is 2710717.

It is a super-2 number, since 2×71701720² = 10282273301916800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71701723) 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, 896232 + ... + 896311.

It is an arithmetic number, because the mean of its divisors is an integer number (10083060).

Almost surely, 2^71701720 is an apocalyptic number.

It is an amenable number.

71701720 is an abundant number, since it is smaller than the sum of its proper divisors (89627240).

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

71701720 is a wasteful number, since it uses less digits than its factorization.

71701720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792554 (or 1792550 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 25.

The square root of 71701720 is about 8467.6868151816. The cubic root of 71701720 is about 415.4414811177.

The spelling of 71701720 in words is "seventy-one million, seven hundred one thousand, seven hundred twenty".