80717020 has 48 divisors (see below), whose sum is σ = 183683808. Its totient is φ = 29675520.

The previous prime is 80717011. The next prime is 80717023. The reversal of 80717020 is 2071708.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80717023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11860 + ... + 17380.

It is an arithmetic number, because the mean of its divisors is an integer number (3826746).

Almost surely, 2^80717020 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 80717020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91841904).

80717020 is an abundant number, since it is smaller than the sum of its proper divisors (102966788).

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

80717020 is a wasteful number, since it uses less digits than its factorization.

80717020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 80717020 is about 8984.2651341109. The cubic root of 80717020 is about 432.1704217296.

Adding to 80717020 its reverse (2071708), we get a palindrome (82788728).

The spelling of 80717020 in words is "eighty million, seven hundred seventeen thousand, twenty".