80862720 has 80 divisors (see below), whose sum is σ = 258532560. Its totient is φ = 21561344.

The previous prime is 80862697. The next prime is 80862731. The reversal of 80862720 is 2726808.

It is a tau number, because it is divible by the number of its divisors (80).

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 7 ways as a sum of consecutive naturals, for example, 2416 + ... + 12944.

It is an arithmetic number, because the mean of its divisors is an integer number (3231657).

Almost surely, 2^80862720 is an apocalyptic number.

80862720 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 80862720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129266280).

80862720 is an abundant number, since it is smaller than the sum of its proper divisors (177669840).

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

80862720 is a wasteful number, since it uses less digits than its factorization.

80862720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555 (or 10539 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 80862720 is about 8992.3700991452. The cubic root of 80862720 is about 432.4302982778.

The spelling of 80862720 in words is "eighty million, eight hundred sixty-two thousand, seven hundred twenty".