1685351448 has 160 divisors (see below), whose sum is σ = 5202893520. Its totient is φ = 505440000.

The previous prime is 1685351419. The next prime is 1685351449. The reversal of 1685351448 is 8441535861.

1685351448 is a `hidden beast` number, since 1 + 68 + 535 + 14 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685351449) 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 39 ways as a sum of consecutive naturals, for example, 718758 + ... + 721098.

Almost surely, 2^1685351448 is an apocalyptic number.

1685351448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685351448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2601446760).

1685351448 is an abundant number, since it is smaller than the sum of its proper divisors (3517542072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1685351448 is a wasteful number, since it uses less digits than its factorization.

1685351448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471 (or 2458 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 1685351448 is about 41053.0321413656. The cubic root of 1685351448 is about 1190.0452982780.

The spelling of 1685351448 in words is "one billion, six hundred eighty-five million, three hundred fifty-one thousand, four hundred forty-eight".