71612980 has 12 divisors (see below), whose sum is σ = 150387300. Its totient is φ = 28645184.

The previous prime is 71612971. The next prime is 71612999. The reversal of 71612980 is 8921617.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37015056 + 34597924 = 6084^2 + 5882^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1790305 + ... + 1790344.

It is an arithmetic number, because the mean of its divisors is an integer number (12532275).

Almost surely, 2^71612980 is an apocalyptic number.

It is an amenable number.

71612980 is an abundant number, since it is smaller than the sum of its proper divisors (78774320).

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

71612980 is a wasteful number, since it uses less digits than its factorization.

71612980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580658 (or 3580656 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 71612980 is about 8462.4452730874. The cubic root of 71612980 is about 415.2700231369.

The spelling of 71612980 in words is "seventy-one million, six hundred twelve thousand, nine hundred eighty".