71726220 has 72 divisors (see below), whose sum is σ = 222899040. Its totient is φ = 18658560.

The previous prime is 71726203. The next prime is 71726227. The reversal of 71726220 is 2262717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71726227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2521 + ... + 12239.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^71726220 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 71726220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111449520).

71726220 is an abundant number, since it is smaller than the sum of its proper divisors (151172820).

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

71726220 is a wasteful number, since it uses less digits than its factorization.

71726220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9775 (or 9770 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 71726220 is about 8469.1333677065. The cubic root of 71726220 is about 415.4887935914.

Adding to 71726220 its reverse (2262717), we get a palindrome (73988937).

The spelling of 71726220 in words is "seventy-one million, seven hundred twenty-six thousand, two hundred twenty".