71684514 has 144 divisors (see below), whose sum is σ = 188225856. Its totient is φ = 20386080.

The previous prime is 71684497. The next prime is 71684579. The reversal of 71684514 is 41548617.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 in 71 ways as a sum of consecutive naturals, for example, 1352512 + ... + 1352564.

It is an arithmetic number, because the mean of its divisors is an integer number (1307124).

Almost surely, 2^71684514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71684514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94112928).

71684514 is an abundant number, since it is smaller than the sum of its proper divisors (116541342).

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

71684514 is a wasteful number, since it uses less digits than its factorization.

71684514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 92 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 71684514 is about 8466.6707742772. The cubic root of 71684514 is about 415.4082478008.

The spelling of 71684514 in words is "seventy-one million, six hundred eighty-four thousand, five hundred fourteen".