19728346 has 32 divisors (see below), whose sum is σ = 34372800. Its totient is φ = 8398080.

The previous prime is 19728337. The next prime is 19728367. The reversal of 19728346 is 64382791.

It is a junction number, because it is equal to n+sod(n) for n = 19728299 and 19728308.

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 15 ways as a sum of consecutive naturals, for example, 45346 + ... + 45778.

It is an arithmetic number, because the mean of its divisors is an integer number (1074150).

Almost surely, 2^19728346 is an apocalyptic number.

19728346 is a deficient number, since it is larger than the sum of its proper divisors (14644454).

19728346 is a wasteful number, since it uses less digits than its factorization.

19728346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574.

The product of its digits is 72576, while the sum is 40.

The square root of 19728346 is about 4441.6602751674. The cubic root of 19728346 is about 270.2071843693.

The spelling of 19728346 in words is "nineteen million, seven hundred twenty-eight thousand, three hundred forty-six".