71320650 has 48 divisors (see below), whose sum is σ = 178021344. Its totient is φ = 18895680.

The previous prime is 71320637. The next prime is 71320673. The reversal of 71320650 is 5602317.

It is a self number, because there is not a number n which added to its sum of digits gives 71320650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22992 + ... + 25908.

It is an arithmetic number, because the mean of its divisors is an integer number (3708778).

Almost surely, 2^71320650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71320650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89010672).

71320650 is an abundant number, since it is smaller than the sum of its proper divisors (106700694).

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

71320650 is a wasteful number, since it uses less digits than its factorization.

71320650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 71320650 is about 8445.1554159767. The cubic root of 71320650 is about 414.7041972018.

Adding to 71320650 its reverse (5602317), we get a palindrome (76922967).

The spelling of 71320650 in words is "seventy-one million, three hundred twenty thousand, six hundred fifty".