1685221932 has 12 divisors (see below), whose sum is σ = 3932184536. Its totient is φ = 561740640.

The previous prime is 1685221921. The next prime is 1685221939. The reversal of 1685221932 is 2391225861.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1685221939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70217569 + ... + 70217592.

Almost surely, 2^1685221932 is an apocalyptic number.

1685221932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1685221932 is an abundant number, since it is smaller than the sum of its proper divisors (2246962604).

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

1685221932 is a wasteful number, since it uses less digits than its factorization.

1685221932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140435168 (or 140435166 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 1685221932 is about 41051.4546879888. The cubic root of 1685221932 is about 1190.0148132704.

The spelling of 1685221932 in words is "one billion, six hundred eighty-five million, two hundred twenty-one thousand, nine hundred thirty-two".