71081444 has 12 divisors (see below), whose sum is σ = 142162944. Its totient is φ = 30463464.

The previous prime is 71081429. The next prime is 71081459. The reversal of 71081444 is 44418017.

It is an interprime number because it is at equal distance from previous prime (71081429) and next prime (71081459).

71081444 is an admirable number.

It is a super-2 number, since 2×71081444² = 10105143362250272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269284 + ... + 1269339.

It is an arithmetic number, because the mean of its divisors is an integer number (11846912).

Almost surely, 2^71081444 is an apocalyptic number.

It is an amenable number.

71081444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71081444 is a wasteful number, since it uses less digits than its factorization.

71081444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538634 (or 2538632 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 71081444 is about 8430.9812003111. The cubic root of 71081444 is about 414.2400453141.

The spelling of 71081444 in words is "seventy-one million, eighty-one thousand, four hundred forty-four".