1685471992 has 8 divisors (see below), whose sum is σ = 3160260000. Its totient is φ = 842735992.

The previous prime is 1685471981. The next prime is 1685472011. The reversal of 1685471992 is 2991745861.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105341992 + ... + 105342007.

It is an arithmetic number, because the mean of its divisors is an integer number (395032500).

Almost surely, 2^1685471992 is an apocalyptic number.

It is an amenable number.

1685471992 is a deficient number, since it is larger than the sum of its proper divisors (1474788008).

1685471992 is a wasteful number, since it uses less digits than its factorization.

1685471992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210684005 (or 210684001 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 52.

The square root of 1685471992 is about 41054.5002648918. The cubic root of 1685471992 is about 1190.0736700855.

The spelling of 1685471992 in words is "one billion, six hundred eighty-five million, four hundred seventy-one thousand, nine hundred ninety-two".