1685430916 has 27 divisors (see below), whose sum is σ = 3195865701. Its totient is φ = 777398544.

The previous prime is 1685430893. The next prime is 1685430931. The reversal of 1685430916 is 6190345861.

The square root of 1685430916 is 41054.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 249324100 + 1436106816 = 15790^2 + 37896^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1066615 + ... + 1068193.

Almost surely, 2^1685430916 is an apocalyptic number.

1685430916 is the 41054-th square number.

It is an amenable number.

1685430916 is a deficient number, since it is larger than the sum of its proper divisors (1510434785).

1685430916 is an equidigital number, since it uses as much as digits as its factorization.

1685430916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The cubic root of 1685430916 is about 1190.0640023953.

The spelling of 1685430916 in words is "one billion, six hundred eighty-five million, four hundred thirty thousand, nine hundred sixteen".