80700720 has 40 divisors (see below), whose sum is σ = 250172976. Its totient is φ = 21520128.

The previous prime is 80700709. The next prime is 80700727. The reversal of 80700720 is 2700708.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (80700727) 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, 167887 + ... + 168366.

Almost surely, 2^80700720 is an apocalyptic number.

80700720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80700720 is an abundant number, since it is smaller than the sum of its proper divisors (169472256).

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

80700720 is a wasteful number, since it uses less digits than its factorization.

80700720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336269 (or 336263 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 80700720 is about 8983.3579467814. The cubic root of 80700720 is about 432.1413289306.

The spelling of 80700720 in words is "eighty million, seven hundred thousand, seven hundred twenty".