1684021612 has 96 divisors (see below), whose sum is σ = 3725568000. Its totient is φ = 661824576.

The previous prime is 1684021583. The next prime is 1684021621. The reversal of 1684021612 is 2161204861.

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 31 ways as a sum of consecutive naturals, for example, 4690689 + ... + 4691047.

It is an arithmetic number, because the mean of its divisors is an integer number (38808000).

Almost surely, 2^1684021612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1684021612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784000).

1684021612 is an abundant number, since it is smaller than the sum of its proper divisors (2041546388).

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

1684021612 is a wasteful number, since it uses less digits than its factorization.

1684021612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1684021612 is about 41036.8323826291. The cubic root of 1684021612 is about 1189.7322119466.

The spelling of 1684021612 in words is "one billion, six hundred eighty-four million, twenty-one thousand, six hundred twelve".