71638122 has 16 divisors (see below), whose sum is σ = 144323712. Its totient is φ = 23704800.

The previous prime is 71638121. The next prime is 71638159. The reversal of 71638122 is 22183617.

It is a self number, because there is not a number n which added to its sum of digits gives 71638122.

It is not an unprimeable number, because it can be changed into a prime (71638121) 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 7 ways as a sum of consecutive naturals, for example, 42754 + ... + 44397.

It is an arithmetic number, because the mean of its divisors is an integer number (9020232).

Almost surely, 2^71638122 is an apocalyptic number.

71638122 is an abundant number, since it is smaller than the sum of its proper divisors (72685590).

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

71638122 is a wasteful number, since it uses less digits than its factorization.

71638122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87293.

The product of its digits is 4032, while the sum is 30.

The square root of 71638122 is about 8463.9306471639. The cubic root of 71638122 is about 415.3186153396.

The spelling of 71638122 in words is "seventy-one million, six hundred thirty-eight thousand, one hundred twenty-two".