80706720 has 96 divisors (see below), whose sum is σ = 255564288. Its totient is φ = 21408768.

The previous prime is 80706719. The next prime is 80706751. The reversal of 80706720 is 2760708.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132657 + ... + 133263.

It is an arithmetic number, because the mean of its divisors is an integer number (2662128).

Almost surely, 2^80706720 is an apocalyptic number.

80706720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80706720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127782144).

80706720 is an abundant number, since it is smaller than the sum of its proper divisors (174857568).

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

80706720 is a wasteful number, since it uses less digits than its factorization.

80706720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 80706720 is about 8983.6918914219. The cubic root of 80706720 is about 432.1520383919.

The spelling of 80706720 in words is "eighty million, seven hundred six thousand, seven hundred twenty".