19340728 has 32 divisors (see below), whose sum is σ = 39755520. Its totient is φ = 8748000.

The previous prime is 19340719. The next prime is 19340729. The reversal of 19340728 is 82704391.

It is a junction number, because it is equal to n+sod(n) for n = 19340693 and 19340702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19340729) 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 7 ways as a sum of consecutive naturals, for example, 23443 + ... + 24253.

It is an arithmetic number, because the mean of its divisors is an integer number (1242360).

Almost surely, 2^19340728 is an apocalyptic number.

It is an amenable number.

19340728 is an abundant number, since it is smaller than the sum of its proper divisors (20414792).

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

19340728 is a wasteful number, since it uses less digits than its factorization.

19340728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 19340728 is about 4397.8094547172. The cubic root of 19340728 is about 268.4258100643.

The spelling of 19340728 in words is "nineteen million, three hundred forty thousand, seven hundred twenty-eight".