71918844 has 12 divisors (see below), whose sum is σ = 167810664. Its totient is φ = 23972944.

The previous prime is 71918843. The next prime is 71918849. The reversal of 71918844 is 44881917.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×71918844³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71918796 and 71918805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71918843) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2996607 + ... + 2996630.

It is an arithmetic number, because the mean of its divisors is an integer number (13984222).

Almost surely, 2^71918844 is an apocalyptic number.

It is an amenable number.

71918844 is an abundant number, since it is smaller than the sum of its proper divisors (95891820).

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

71918844 is a wasteful number, since it uses less digits than its factorization.

71918844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5993244 (or 5993242 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 71918844 is about 8480.4978627437. The cubic root of 71918844 is about 415.8603991024.

The spelling of 71918844 in words is "seventy-one million, nine hundred eighteen thousand, eight hundred forty-four".