1685874736 has 160 divisors (see below), whose sum is σ = 4255727616. Its totient is φ = 628992000.

The previous prime is 1685874733. The next prime is 1685874739. The reversal of 1685874736 is 6374785861.

It is an interprime number because it is at equal distance from previous prime (1685874733) and next prime (1685874739).

It is not an unprimeable number, because it can be changed into a prime (1685874733) 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 31 ways as a sum of consecutive naturals, for example, 1850121 + ... + 1851031.

Almost surely, 2^1685874736 is an apocalyptic number.

1685874736 is a gapful number since it is divisible by the number (16) 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 1685874736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127863808).

1685874736 is an abundant number, since it is smaller than the sum of its proper divisors (2569852880).

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

1685874736 is a wasteful number, since it uses less digits than its factorization.

1685874736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1005 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 55.

The square root of 1685874736 is about 41059.4049640274. The cubic root of 1685874736 is about 1190.1684520144.

The spelling of 1685874736 in words is "one billion, six hundred eighty-five million, eight hundred seventy-four thousand, seven hundred thirty-six".