71443730 has 32 divisors (see below), whose sum is σ = 132427008. Its totient is φ = 27734400.

The previous prime is 71443717. The next prime is 71443739. The reversal of 71443730 is 3734417.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71443693 and 71443702.

It is not an unprimeable number, because it can be changed into a prime (71443739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110789 + ... + 111431.

It is an arithmetic number, because the mean of its divisors is an integer number (4138344).

Almost surely, 2^71443730 is an apocalyptic number.

71443730 is a deficient number, since it is larger than the sum of its proper divisors (60983278).

71443730 is a wasteful number, since it uses less digits than its factorization.

71443730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 71443730 is about 8452.4392928905. The cubic root of 71443730 is about 414.9426155716.

It can be divided in two parts, 714 and 43730, that added together give a palindrome (44444).

The spelling of 71443730 in words is "seventy-one million, four hundred forty-three thousand, seven hundred thirty".