1720720132 has 12 divisors (see below), whose sum is σ = 3062298960. Its totient is φ = 845777576.

The previous prime is 1720720097. The next prime is 1720720159. The reversal of 1720720132 is 2310270271.

It is a junction number, because it is equal to n+sod(n) for n = 1720720097 and 1720720106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3645358 + ... + 3645829.

It is an arithmetic number, because the mean of its divisors is an integer number (255191580).

Almost surely, 2^1720720132 is an apocalyptic number.

It is an amenable number.

1720720132 is a deficient number, since it is larger than the sum of its proper divisors (1341578828).

1720720132 is a wasteful number, since it uses less digits than its factorization.

1720720132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7291250 (or 7291248 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 1720720132 is about 41481.5637603020. The cubic root of 1720720132 is about 1198.3124733610.

The spelling of 1720720132 in words is "one billion, seven hundred twenty million, seven hundred twenty thousand, one hundred thirty-two".