71730790 has 32 divisors (see below), whose sum is σ = 138386880. Its totient is φ = 26699904.

The previous prime is 71730779. The next prime is 71730793. The reversal of 71730790 is 9703717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71730793) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4296 + ... + 12724.

It is an arithmetic number, because the mean of its divisors is an integer number (4324590).

Almost surely, 2^71730790 is an apocalyptic number.

71730790 is a deficient number, since it is larger than the sum of its proper divisors (66656090).

71730790 is a wasteful number, since it uses less digits than its factorization.

71730790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 71730790 is about 8469.4031666936. The cubic root of 71730790 is about 415.4976176238.

The spelling of 71730790 in words is "seventy-one million, seven hundred thirty thousand, seven hundred ninety".