71720742 has 8 divisors (see below), whose sum is σ = 143441496. Its totient is φ = 23906912.

The previous prime is 71720723. The next prime is 71720809. The reversal of 71720742 is 24702717.

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

71720742 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5976723 + ... + 5976734.

It is an arithmetic number, because the mean of its divisors is an integer number (17930187).

Almost surely, 2^71720742 is an apocalyptic number.

71720742 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.

71720742 is a wasteful number, since it uses less digits than its factorization.

71720742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953462.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 71720742 is about 8468.8099518173. The cubic root of 71720742 is about 415.4782158438.

The spelling of 71720742 in words is "seventy-one million, seven hundred twenty thousand, seven hundred forty-two".