71380544 has 14 divisors (see below), whose sum is σ = 141645894. Its totient is φ = 35690240.

The previous prime is 71380541. The next prime is 71380577. The reversal of 71380544 is 44508317.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 2689600 = 8288^2 + 1640^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 71380544.

It is not an unprimeable number, because it can be changed into a prime (71380541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557597 + ... + 557724.

Almost surely, 2^71380544 is an apocalyptic number.

It is an amenable number.

71380544 is a deficient number, since it is larger than the sum of its proper divisors (70265350).

71380544 is a wasteful number, since it uses less digits than its factorization.

71380544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115333 (or 1115323 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 71380544 is about 8448.7007285144. The cubic root of 71380544 is about 414.8202521522.

The spelling of 71380544 in words is "seventy-one million, three hundred eighty thousand, five hundred forty-four".