80723720 has 64 divisors (see below), whose sum is σ = 226454400. Its totient is φ = 25159680.

The previous prime is 80723707. The next prime is 80723737. The reversal of 80723720 is 2732708.

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, 10025 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (3538350).

Almost surely, 2^80723720 is an apocalyptic number.

It is an amenable number.

80723720 is an abundant number, since it is smaller than the sum of its proper divisors (145730680).

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

80723720 is a wasteful number, since it uses less digits than its factorization.

80723720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26238 (or 26234 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 80723720 is about 8984.6380004984. The cubic root of 80723720 is about 432.1823789835.

The spelling of 80723720 in words is "eighty million, seven hundred twenty-three thousand, seven hundred twenty".