1685938968 has 128 divisors (see below), whose sum is σ = 5524992000. Its totient is φ = 466145280.

The previous prime is 1685938963. The next prime is 1685938979. The reversal of 1685938968 is 8698395861.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685938963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28888 + ... + 64856.

It is an arithmetic number, because the mean of its divisors is an integer number (43164000).

Almost surely, 2^1685938968 is an apocalyptic number.

1685938968 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 1685938968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2762496000).

1685938968 is an abundant number, since it is smaller than the sum of its proper divisors (3839053032).

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

1685938968 is a wasteful number, since it uses less digits than its factorization.

1685938968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36022 (or 36012 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The square root of 1685938968 is about 41060.1871403431. The cubic root of 1685938968 is about 1190.1835670023.

The spelling of 1685938968 in words is "one billion, six hundred eighty-five million, nine hundred thirty-eight thousand, nine hundred sixty-eight".