1639384068 has 96 divisors (see below), whose sum is σ = 4665149440. Its totient is φ = 437633280.

The previous prime is 1639384037. The next prime is 1639384079. The reversal of 1639384068 is 8604839361.

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, 109473 + ... + 123543.

Almost surely, 2^1639384068 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 1639384068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2332574720).

1639384068 is an abundant number, since it is smaller than the sum of its proper divisors (3025765372).

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

1639384068 is a wasteful number, since it uses less digits than its factorization.

1639384068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177 (or 14175 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1639384068 is about 40489.3080701560. The cubic root of 1639384068 is about 1179.1260569038.

The spelling of 1639384068 in words is "one billion, six hundred thirty-nine million, three hundred eighty-four thousand, sixty-eight".