80319720 has 64 divisors (see below), whose sum is σ = 259499520. Its totient is φ = 19770624.

The previous prime is 80319683. The next prime is 80319721. The reversal of 80319720 is 2791308.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (80319721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24184 + ... + 27303.

It is an arithmetic number, because the mean of its divisors is an integer number (4054680).

Almost surely, 2^80319720 is an apocalyptic number.

It is an amenable number.

80319720 is an abundant number, since it is smaller than the sum of its proper divisors (179179800).

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

80319720 is a wasteful number, since it uses less digits than its factorization.

80319720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51514 (or 51510 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 80319720 is about 8962.1269796851. The cubic root of 80319720 is about 431.4601882343.

The spelling of 80319720 in words is "eighty million, three hundred nineteen thousand, seven hundred twenty".