1685072104 has 16 divisors (see below), whose sum is σ = 3160315620. Its totient is φ = 842321280.

The previous prime is 1685072099. The next prime is 1685072107. The reversal of 1685072104 is 4012705861.

It can be written as a sum of positive squares in 2 ways, for example, as 1444760100 + 240312004 = 38010^2 + 15502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1685072104.

It is not an unprimeable number, because it can be changed into a prime (1685072107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9372 + ... + 58804.

Almost surely, 2^1685072104 is an apocalyptic number.

It is an amenable number.

1685072104 is a deficient number, since it is larger than the sum of its proper divisors (1475243516).

1685072104 is a wasteful number, since it uses less digits than its factorization.

1685072104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53700 (or 53696 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1685072104 is about 41049.6297669053. The cubic root of 1685072104 is about 1189.9795453490.

Adding to 1685072104 its reverse (4012705861), we get a palindrome (5697777965).

The spelling of 1685072104 in words is "one billion, six hundred eighty-five million, seventy-two thousand, one hundred four".