71143444 has 24 divisors (see below), whose sum is σ = 126862848. Its totient is φ = 34903680.

The previous prime is 71143433. The next prime is 71143463. The reversal of 71143444 is 44434117.

It is a super-2 number, since 2×71143444² = 10122779248362272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47629 + ... + 49099.

It is an arithmetic number, because the mean of its divisors is an integer number (5285952).

Almost surely, 2^71143444 is an apocalyptic number.

It is an amenable number.

71143444 is a deficient number, since it is larger than the sum of its proper divisors (55719404).

71143444 is a wasteful number, since it uses less digits than its factorization.

71143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695 (or 1693 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 71143444 is about 8434.6573137265. The cubic root of 71143444 is about 414.3604490734.

The spelling of 71143444 in words is "seventy-one million, one hundred forty-three thousand, four hundred forty-four".