71185872 has 20 divisors (see below), whose sum is σ = 183896960. Its totient is φ = 23728608.

The previous prime is 71185861. The next prime is 71185957. The reversal of 71185872 is 27858117.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71185872.

It is a congruent number.

It is an unprimeable number.

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, 741472 + ... + 741567.

It is an arithmetic number, because the mean of its divisors is an integer number (9194848).

Almost surely, 2^71185872 is an apocalyptic number.

It is an amenable number.

71185872 is an abundant number, since it is smaller than the sum of its proper divisors (112711088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71185872 is a wasteful number, since it uses less digits than its factorization.

71185872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483050 (or 1483044 counting only the distinct ones).

The product of its digits is 31360, while the sum is 39.

The square root of 71185872 is about 8437.1720380706. The cubic root of 71185872 is about 414.4428037757.

The spelling of 71185872 in words is "seventy-one million, one hundred eighty-five thousand, eight hundred seventy-two".