1685471984 has 40 divisors (see below), whose sum is σ = 3852515328. Its totient is φ = 699042240.

The previous prime is 1685471981. The next prime is 1685472011. The reversal of 1685471984 is 4891745861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685471981) 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, 239252 + ... + 246195.

Almost surely, 2^1685471984 is an apocalyptic number.

1685471984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1685471984 is an abundant number, since it is smaller than the sum of its proper divisors (2167043344).

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

1685471984 is a wasteful number, since it uses less digits than its factorization.

1685471984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485493 (or 485487 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The square root of 1685471984 is about 41054.5001674603. The cubic root of 1685471984 is about 1190.0736682026.

The spelling of 1685471984 in words is "one billion, six hundred eighty-five million, four hundred seventy-one thousand, nine hundred eighty-four".