19368728 has 16 divisors (see below), whose sum is σ = 37202760. Its totient is φ = 9448000.

The previous prime is 19368703. The next prime is 19368731. The reversal of 19368728 is 82786391.

It is a zygodrome in base 3.

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 3 ways as a sum of consecutive naturals, for example, 29198 + ... + 29853.

Almost surely, 2^19368728 is an apocalyptic number.

It is an amenable number.

19368728 is a deficient number, since it is larger than the sum of its proper divisors (17834032).

19368728 is a wasteful number, since it uses less digits than its factorization.

19368728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59098 (or 59094 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 19368728 is about 4400.9917064225. The cubic root of 19368728 is about 268.5552829329. Note that the first 3 decimals are identical.

It can be divided in two parts, 193 and 68728, that added together give a cube (68921 = 41³).

The spelling of 19368728 in words is "nineteen million, three hundred sixty-eight thousand, seven hundred twenty-eight".