19439982 has 12 divisors (see below), whose sum is σ = 42120000. Its totient is φ = 6479988.

The previous prime is 19439977. The next prime is 19440019. The reversal of 19439982 is 28993491.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 539982 + ... + 540017.

It is an arithmetic number, because the mean of its divisors is an integer number (3510000).

Almost surely, 2^19439982 is an apocalyptic number.

19439982 is an abundant number, since it is smaller than the sum of its proper divisors (22680018).

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

19439982 is a wasteful number, since it uses less digits than its factorization.

19439982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080007 (or 1080004 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19439982 is about 4409.0794957678. The cubic root of 19439982 is about 268.8842018044.

It can be divided in two parts, 194399 and 82, that added together give a 4-th power (194481 = 21⁴).

The spelling of 19439982 in words is "nineteen million, four hundred thirty-nine thousand, nine hundred eighty-two".