1684894920 has 64 divisors (see below), whose sum is σ = 5320728000. Its totient is φ = 425657088.

The previous prime is 1684894879. The next prime is 1684894931. The reversal of 1684894920 is 294984861.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367215 + ... + 371774.

It is an arithmetic number, because the mean of its divisors is an integer number (83136375).

Almost surely, 2^1684894920 is an apocalyptic number.

1684894920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1684894920 is an abundant number, since it is smaller than the sum of its proper divisors (3635833080).

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

1684894920 is a wasteful number, since it uses less digits than its factorization.

1684894920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739022 (or 739018 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 1684894920 is about 41047.4715421060. The cubic root of 1684894920 is about 1189.9378354175.

The spelling of 1684894920 in words is "one billion, six hundred eighty-four million, eight hundred ninety-four thousand, nine hundred twenty".