80711964 has 84 divisors (see below), whose sum is σ = 214840080. Its totient is φ = 26516160.

The previous prime is 80711963. The next prime is 80711977. The reversal of 80711964 is 46911708.

It is a super-2 number, since 2×80711964² = 13028842265474592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80711963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 259369 + ... + 259679.

It is an arithmetic number, because the mean of its divisors is an integer number (2557620).

Almost surely, 2^80711964 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 80711964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107420040).

80711964 is an abundant number, since it is smaller than the sum of its proper divisors (134128116).

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

80711964 is a wasteful number, since it uses less digits than its factorization.

80711964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 80711964 is about 8983.9837488722. The cubic root of 80711964 is about 432.1613980265.

The spelling of 80711964 in words is "eighty million, seven hundred eleven thousand, nine hundred sixty-four".