71187044 has 12 divisors (see below), whose sum is σ = 124637184. Its totient is φ = 35576424.

The previous prime is 71187023. The next prime is 71187049. The reversal of 71187044 is 44078117.

It is a self number, because there is not a number n which added to its sum of digits gives 71187044.

It is not an unprimeable number, because it can be changed into a prime (71187049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11849 + ... + 16815.

It is an arithmetic number, because the mean of its divisors is an integer number (10386432).

Almost surely, 2^71187044 is an apocalyptic number.

It is an amenable number.

71187044 is a deficient number, since it is larger than the sum of its proper divisors (53450140).

71187044 is a wasteful number, since it uses less digits than its factorization.

71187044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554 (or 8552 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 71187044 is about 8437.2414923362. The cubic root of 71187044 is about 414.4450782171.

The spelling of 71187044 in words is "seventy-one million, one hundred eighty-seven thousand, forty-four".