19640382 has 8 divisors (see below), whose sum is σ = 39280776. Its totient is φ = 6546792.

The previous prime is 19640381. The next prime is 19640399. The reversal of 19640382 is 28304691.

19640382 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

19640382 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19640381) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1636693 + ... + 1636704.

It is an arithmetic number, because the mean of its divisors is an integer number (4910097).

Almost surely, 2^19640382 is an apocalyptic number.

19640382 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19640382 is a wasteful number, since it uses less digits than its factorization.

19640382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273402.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 19640382 is about 4431.7470595692. The cubic root of 19640382 is about 269.8049895009.

The spelling of 19640382 in words is "nineteen million, six hundred forty thousand, three hundred eighty-two".