1684537044 has 12 divisors (see below), whose sum is σ = 3930586464. Its totient is φ = 561512344.

The previous prime is 1684537037. The next prime is 1684537061. The reversal of 1684537044 is 4407354861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1684536987 and 1684537005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70189032 + ... + 70189055.

It is an arithmetic number, because the mean of its divisors is an integer number (327548872).

Almost surely, 2^1684537044 is an apocalyptic number.

It is an amenable number.

1684537044 is an abundant number, since it is smaller than the sum of its proper divisors (2246049420).

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

1684537044 is a wasteful number, since it uses less digits than its factorization.

1684537044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140378094 (or 140378092 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 1684537044 is about 41043.1120165126. The cubic root of 1684537044 is about 1189.8535808364.

The spelling of 1684537044 in words is "one billion, six hundred eighty-four million, five hundred thirty-seven thousand, forty-four".