71055720 has 96 divisors (see below), whose sum is σ = 238417920. Its totient is φ = 18334080.

The previous prime is 71055707. The next prime is 71055757. The reversal of 71055720 is 2755017.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7977 + ... + 14343.

It is an arithmetic number, because the mean of its divisors is an integer number (2483520).

Almost surely, 2^71055720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71055720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119208960).

71055720 is an abundant number, since it is smaller than the sum of its proper divisors (167362200).

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

71055720 is a wasteful number, since it uses less digits than its factorization.

71055720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415 (or 6408 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 71055720 is about 8429.4554984293. The cubic root of 71055720 is about 414.1900688550.

The spelling of 71055720 in words is "seventy-one million, fifty-five thousand, seven hundred twenty".