71650000 has 60 divisors (see below), whose sum is σ = 173637324. Its totient is φ = 28640000.

The previous prime is 71649989. The next prime is 71650009. The reversal of 71650000 is 5617.

It can be written as a sum of positive squares in 6 ways, for example, as 48108096 + 23541904 = 6936^2 + 4852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71650000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71650009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49284 + ... + 50716.

Almost surely, 2^71650000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86818662).

71650000 is an abundant number, since it is smaller than the sum of its proper divisors (101987324).

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

71650000 is an equidigital number, since it uses as much as digits as its factorization.

71650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1440 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 71650000 is about 8464.6323015238. The cubic root of 71650000 is about 415.3415681183.

Adding to 71650000 its reverse (5617), we get a palindrome (71655617).

The spelling of 71650000 in words is "seventy-one million, six hundred fifty thousand".