1685372844 has 24 divisors (see below), whose sum is σ = 3942163120. Its totient is φ = 560415744.

The previous prime is 1685372837. The next prime is 1685372861. The reversal of 1685372844 is 4482735861.

It is a junction number, because it is equal to n+sod(n) for n = 1685372793 and 1685372802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166789 + ... + 176604.

Almost surely, 2^1685372844 is an apocalyptic number.

It is an amenable number.

1685372844 is an abundant number, since it is smaller than the sum of its proper divisors (2256790276).

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

1685372844 is a wasteful number, since it uses less digits than its factorization.

1685372844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343809 (or 343807 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 1685372844 is about 41053.2927303036. The cubic root of 1685372844 is about 1190.0503342408.

The spelling of 1685372844 in words is "one billion, six hundred eighty-five million, three hundred seventy-two thousand, eight hundred forty-four".