1684044240 has 80 divisors (see below), whose sum is σ = 5239325376. Its totient is φ = 447462400.

The previous prime is 1684044137. The next prime is 1684044281. The reversal of 1684044240 is 424404861.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54955 + ... + 79925.

Almost surely, 2^1684044240 is an apocalyptic number.

1684044240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1684044240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2619662688).

1684044240 is an abundant number, since it is smaller than the sum of its proper divisors (3555281136).

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

1684044240 is a wasteful number, since it uses less digits than its factorization.

1684044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25268 (or 25262 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 1684044240 is about 41037.1080852440. The cubic root of 1684044240 is about 1189.7375406866.

The spelling of 1684044240 in words is "one billion, six hundred eighty-four million, forty-four thousand, two hundred forty".