71222638 has 8 divisors (see below), whose sum is σ = 107935632. Its totient is φ = 35244096.

The previous prime is 71222633. The next prime is 71222647. The reversal of 71222638 is 83622217.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71222633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183370 + ... + 183757.

It is an arithmetic number, because the mean of its divisors is an integer number (13491954).

Almost surely, 2^71222638 is an apocalyptic number.

71222638 is a deficient number, since it is larger than the sum of its proper divisors (36712994).

71222638 is a wasteful number, since it uses less digits than its factorization.

71222638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367226.

The product of its digits is 8064, while the sum is 31.

The square root of 71222638 is about 8439.3505674311. The cubic root of 71222638 is about 414.5141418150.

The spelling of 71222638 in words is "seventy-one million, two hundred twenty-two thousand, six hundred thirty-eight".