71740624 has 10 divisors (see below), whose sum is σ = 138997490. Its totient is φ = 35870304.

The previous prime is 71740621. The next prime is 71740631. The reversal of 71740624 is 42604717.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 24681024 = 6860^2 + 4968^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71740621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2241879 + ... + 2241910.

It is an arithmetic number, because the mean of its divisors is an integer number (13899749).

Almost surely, 2^71740624 is an apocalyptic number.

It is an amenable number.

71740624 is a deficient number, since it is larger than the sum of its proper divisors (67256866).

71740624 is a wasteful number, since it uses less digits than its factorization.

71740624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483797 (or 4483791 counting only the distinct ones).

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

The square root of 71740624 is about 8469.9837071862. The cubic root of 71740624 is about 415.5166044348.

The spelling of 71740624 in words is "seventy-one million, seven hundred forty thousand, six hundred twenty-four".