71799638 has 4 divisors (see below), whose sum is σ = 107699460. Its totient is φ = 35899818.

The previous prime is 71799631. The next prime is 71799677. The reversal of 71799638 is 83699717.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71799631) by changing a digit.

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 as a sum of consecutive naturals, namely, 17949908 + ... + 17949911.

It is an arithmetic number, because the mean of its divisors is an integer number (26924865).

Almost surely, 2^71799638 is an apocalyptic number.

71799638 is a deficient number, since it is larger than the sum of its proper divisors (35899822).

71799638 is a wasteful number, since it uses less digits than its factorization.

71799638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35899821.

The product of its digits is 571536, while the sum is 50.

The square root of 71799638 is about 8473.4667049561. The cubic root of 71799638 is about 415.6305081751.

The spelling of 71799638 in words is "seventy-one million, seven hundred ninety-nine thousand, six hundred thirty-eight".