19728342 has 24 divisors (see below), whose sum is σ = 44604144. Its totient is φ = 6290064.

The previous prime is 19728337. The next prime is 19728367. The reversal of 19728342 is 24382791.

It is a junction number, because it is equal to n+sod(n) for n = 19728297 and 19728306.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23413 + ... + 24240.

It is an arithmetic number, because the mean of its divisors is an integer number (1858506).

Almost surely, 2^19728342 is an apocalyptic number.

19728342 is an abundant number, since it is smaller than the sum of its proper divisors (24875802).

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

19728342 is a wasteful number, since it uses less digits than its factorization.

19728342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47684 (or 47681 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 19728342 is about 4441.6598248853. The cubic root of 19728342 is about 270.2071661074.

The spelling of 19728342 in words is "nineteen million, seven hundred twenty-eight thousand, three hundred forty-two".