71640726 has 8 divisors (see below), whose sum is σ = 143281464. Its totient is φ = 23880240.

The previous prime is 71640719. The next prime is 71640731. The reversal of 71640726 is 62704617.

It is a sphenic number, since it is the product of 3 distinct primes.

71640726 is an admirable number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 5970055 + ... + 5970066.

It is an arithmetic number, because the mean of its divisors is an integer number (17910183).

Almost surely, 2^71640726 is an apocalyptic number.

71640726 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71640726 is a wasteful number, since it uses less digits than its factorization.

71640726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11940126.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 71640726 is about 8464.0844750038. The cubic root of 71640726 is about 415.3236474674.

The spelling of 71640726 in words is "seventy-one million, six hundred forty thousand, seven hundred twenty-six".