1685785794 has 96 divisors (see below), whose sum is σ = 4299445248. Its totient is φ = 431244000.

The previous prime is 1685785793. The next prime is 1685785799. The reversal of 1685785794 is 4975875861.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1685785793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338019 + ... + 342969.

It is an arithmetic number, because the mean of its divisors is an integer number (44785888).

Almost surely, 2^1685785794 is an apocalyptic number.

1685785794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685785794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149722624).

1685785794 is an abundant number, since it is smaller than the sum of its proper divisors (2613659454).

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

1685785794 is a wasteful number, since it uses less digits than its factorization.

1685785794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052 (or 5041 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 60.

The square root of 1685785794 is about 41058.3218604950. The cubic root of 1685785794 is about 1190.1475216685.

The spelling of 1685785794 in words is "one billion, six hundred eighty-five million, seven hundred eighty-five thousand, seven hundred ninety-four".