71443970 has 16 divisors (see below), whose sum is σ = 138491640. Its totient is φ = 26379264.

The previous prime is 71443961. The next prime is 71443973. The reversal of 71443970 is 7934417.

It can be written as a sum of positive squares in 4 ways, for example, as 61889689 + 9554281 = 7867^2 + 3091^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71443970.

It is not an unprimeable number, because it can be changed into a prime (71443973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274655 + ... + 274914.

Almost surely, 2^71443970 is an apocalyptic number.

71443970 is a deficient number, since it is larger than the sum of its proper divisors (67047670).

71443970 is a wasteful number, since it uses less digits than its factorization.

71443970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549589.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 71443970 is about 8452.4534899637. The cubic root of 71443970 is about 414.9430802082.

The spelling of 71443970 in words is "seventy-one million, four hundred forty-three thousand, nine hundred seventy".