1685021334 has 16 divisors (see below), whose sum is σ = 3568280688. Its totient is φ = 528634112.

The previous prime is 1685021323. The next prime is 1685021339. The reversal of 1685021334 is 4331205861.

It is a junction number, because it is equal to n+sod(n) for n = 1685021295 and 1685021304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685021339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8259807 + ... + 8260010.

It is an arithmetic number, because the mean of its divisors is an integer number (223017543).

Almost surely, 2^1685021334 is an apocalyptic number.

1685021334 is an abundant number, since it is smaller than the sum of its proper divisors (1883259354).

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

1685021334 is a wasteful number, since it uses less digits than its factorization.

1685021334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16519839.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1685021334 is about 41049.0113644653. The cubic root of 1685021334 is about 1189.9675941556.

The spelling of 1685021334 in words is "one billion, six hundred eighty-five million, twenty-one thousand, three hundred thirty-four".