1685412768 has 192 divisors, whose sum is σ = 5047805952. Its totient is φ = 488463360.

The previous prime is 1685412767. The next prime is 1685412779. The reversal of 1685412768 is 8672145861.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1685412761) 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, 2037571 + ... + 2038397.

It is an arithmetic number, because the mean of its divisors is an integer number (26290656).

Almost surely, 2^1685412768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685412768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2523902976).

1685412768 is an abundant number, since it is smaller than the sum of its proper divisors (3362393184).

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

1685412768 is a wasteful number, since it uses less digits than its factorization.

1685412768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 939 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 1685412768 is about 41053.7789734392. The cubic root of 1685412768 is about 1190.0597310131.

The spelling of 1685412768 in words is "one billion, six hundred eighty-five million, four hundred twelve thousand, seven hundred sixty-eight".