71081740 has 24 divisors (see below), whose sum is σ = 150266592. Its totient is φ = 28243200.

The previous prime is 71081701. The next prime is 71081767. The reversal of 71081740 is 4718017.

It is a super-2 number, since 2×71081740² = 10105227522855200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71081699 and 71081708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8749 + ... + 14788.

It is an arithmetic number, because the mean of its divisors is an integer number (6261108).

Almost surely, 2^71081740 is an apocalyptic number.

It is an amenable number.

71081740 is an abundant number, since it is smaller than the sum of its proper divisors (79184852).

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

71081740 is a wasteful number, since it uses less digits than its factorization.

71081740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23697 (or 23695 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 71081740 is about 8430.9987545960. The cubic root of 71081740 is about 414.2406203112.

Adding to 71081740 its reverse (4718017), we get a palindrome (75799757).

The spelling of 71081740 in words is "seventy-one million, eighty-one thousand, seven hundred forty".