1684173840 has 80 divisors (see below), whose sum is σ = 5400993600. Its totient is φ = 433624576.

The previous prime is 1684173839. The next prime is 1684173853. The reversal of 1684173840 is 483714861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1684173792 and 1684173801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114030 + ... + 127949.

It is an arithmetic number, because the mean of its divisors is an integer number (67512420).

Almost surely, 2^1684173840 is an apocalyptic number.

1684173840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1684173840 is an abundant number, since it is smaller than the sum of its proper divisors (3716819760).

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

1684173840 is a wasteful number, since it uses less digits than its factorization.

1684173840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242024 (or 242018 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1684173840 is about 41038.6871135030. The cubic root of 1684173840 is about 1189.7680596850.

The spelling of 1684173840 in words is "one billion, six hundred eighty-four million, one hundred seventy-three thousand, eight hundred forty".