72191716 has 12 divisors (see below), whose sum is σ = 132984880. Its totient is φ = 34196040.

The previous prime is 72191683. The next prime is 72191719. The reversal of 72191716 is 61719127.

It is not an unprimeable number, because it can be changed into a prime (72191719) 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, 474870 + ... + 475021.

Almost surely, 2^72191716 is an apocalyptic number.

72191716 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

72191716 is a deficient number, since it is larger than the sum of its proper divisors (60793164).

72191716 is a wasteful number, since it uses less digits than its factorization.

72191716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949914 (or 949912 counting only the distinct ones).

The product of its digits is 5292, while the sum is 34.

The square root of 72191716 is about 8496.5708376968. The cubic root of 72191716 is about 416.3856830561.

The spelling of 72191716 in words is "seventy-two million, one hundred ninety-one thousand, seven hundred sixteen".