71143744 has 28 divisors (see below), whose sum is σ = 161344864. Its totient is φ = 30489984.

The previous prime is 71143739. The next prime is 71143747. The reversal of 71143744 is 44734117.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×71143744² = 10122864620675072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71143747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78954 + ... + 79849.

Almost surely, 2^71143744 is an apocalyptic number.

It is an amenable number.

71143744 is an abundant number, since it is smaller than the sum of its proper divisors (90201120).

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

71143744 is a wasteful number, since it uses less digits than its factorization.

71143744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158822 (or 158812 counting only the distinct ones).

The product of its digits is 9408, while the sum is 31.

The square root of 71143744 is about 8434.6750974771. The cubic root of 71143744 is about 414.3610315021.

The spelling of 71143744 in words is "seventy-one million, one hundred forty-three thousand, seven hundred forty-four".