71731044 has 144 divisors (see below), whose sum is σ = 229057920. Its totient is φ = 18385920.

The previous prime is 71731039. The next prime is 71731067. The reversal of 71731044 is 44013717.

It is a junction number, because it is equal to n+sod(n) for n = 71730999 and 71731017.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 313122 + ... + 313350.

It is an arithmetic number, because the mean of its divisors is an integer number (1590680).

Almost surely, 2^71731044 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 71731044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114528960).

71731044 is an abundant number, since it is smaller than the sum of its proper divisors (157326876).

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

71731044 is a wasteful number, since it uses less digits than its factorization.

71731044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 365 counting only the distinct ones).

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

The square root of 71731044 is about 8469.4181618338. The cubic root of 71731044 is about 415.4981080514.

The spelling of 71731044 in words is "seventy-one million, seven hundred thirty-one thousand, forty-four".