80308720 has 40 divisors (see below), whose sum is σ = 187135344. Its totient is φ = 32051712.

The previous prime is 80308717. The next prime is 80308721. The reversal of 80308720 is 2780308.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80308721) 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, 48547 + ... + 50173.

Almost surely, 2^80308720 is an apocalyptic number.

80308720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80308720 is an abundant number, since it is smaller than the sum of its proper divisors (106826624).

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

80308720 is a wasteful number, since it uses less digits than its factorization.

80308720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 80308720 is about 8961.5132650686. The cubic root of 80308720 is about 431.4404907937.

The spelling of 80308720 in words is "eighty million, three hundred eight thousand, seven hundred twenty".