71222646 has 32 divisors (see below), whose sum is σ = 156918528. Its totient is φ = 21371040.

The previous prime is 71222633. The next prime is 71222647. The reversal of 71222646 is 64622217.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71222647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560 + ... + 12036.

It is an arithmetic number, because the mean of its divisors is an integer number (4903704).

Almost surely, 2^71222646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71222646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78459264).

71222646 is an abundant number, since it is smaller than the sum of its proper divisors (85695882).

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

71222646 is a wasteful number, since it uses less digits than its factorization.

71222646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596.

The product of its digits is 8064, while the sum is 30.

The square root of 71222646 is about 8439.3510414012. The cubic root of 71222646 is about 414.5141573349.

The spelling of 71222646 in words is "seventy-one million, two hundred twenty-two thousand, six hundred forty-six".