72320716 has 12 divisors (see below), whose sum is σ = 136296832. Its totient is φ = 33378768.

The previous prime is 72320713. The next prime is 72320723. The reversal of 72320716 is 61702327.

It is not an unprimeable number, because it can be changed into a prime (72320713) 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 3 ways as a sum of consecutive naturals, for example, 695340 + ... + 695443.

Almost surely, 2^72320716 is an apocalyptic number.

It is an amenable number.

72320716 is a deficient number, since it is larger than the sum of its proper divisors (63976116).

72320716 is a wasteful number, since it uses less digits than its factorization.

72320716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390800 (or 1390798 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 72320716 is about 8504.1587473424. The cubic root of 72320716 is about 416.6335498657.

The spelling of 72320716 in words is "seventy-two million, three hundred twenty thousand, seven hundred sixteen".