80695720 has 32 divisors (see below), whose sum is σ = 207504000. Its totient is φ = 27667008.

The previous prime is 80695711. The next prime is 80695723. The reversal of 80695720 is 2759608.

It is a self number, because there is not a number n which added to its sum of digits gives 80695720.

It is not an unprimeable number, because it can be changed into a prime (80695723) 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 7 ways as a sum of consecutive naturals, for example, 143820 + ... + 144379.

It is an arithmetic number, because the mean of its divisors is an integer number (6484500).

Almost surely, 2^80695720 is an apocalyptic number.

It is an amenable number.

80695720 is an abundant number, since it is smaller than the sum of its proper divisors (126808280).

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

80695720 is a wasteful number, since it uses less digits than its factorization.

80695720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288217 (or 288213 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 80695720 is about 8983.0796500977. The cubic root of 80695720 is about 432.1324039740.

The spelling of 80695720 in words is "eighty million, six hundred ninety-five thousand, seven hundred twenty".