1685720332 has 48 divisors (see below), whose sum is σ = 3051240192. Its totient is φ = 814544640.

The previous prime is 1685720317. The next prime is 1685720339. The reversal of 1685720332 is 2330275861.

It is a junction number, because it is equal to n+sod(n) for n = 1685720291 and 1685720300.

It is not an unprimeable number, because it can be changed into a prime (1685720339) 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 15 ways as a sum of consecutive naturals, for example, 7559173 + ... + 7559395.

It is an arithmetic number, because the mean of its divisors is an integer number (63567504).

Almost surely, 2^1685720332 is an apocalyptic number.

It is an amenable number.

1685720332 is a deficient number, since it is larger than the sum of its proper divisors (1365519860).

1685720332 is a wasteful number, since it uses less digits than its factorization.

1685720332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1685720332 is about 41057.5246696632. The cubic root of 1685720332 is about 1190.1321163017.

The spelling of 1685720332 in words is "one billion, six hundred eighty-five million, seven hundred twenty thousand, three hundred thirty-two".