71089944 has 128 divisors (see below), whose sum is σ = 199065600. Its totient is φ = 21064320.

The previous prime is 71089927. The next prime is 71089951. The reversal of 71089944 is 44998017.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71089896 and 71089905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664339 + ... + 664445.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^71089944 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 71089944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99532800).

71089944 is an abundant number, since it is smaller than the sum of its proper divisors (127975656).

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

71089944 is a wasteful number, since it uses less digits than its factorization.

71089944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 71089944 is about 8431.4852784074. The cubic root of 71089944 is about 414.2565564214.

The spelling of 71089944 in words is "seventy-one million, eighty-nine thousand, nine hundred forty-four".