19380404 has 24 divisors (see below), whose sum is σ = 34904520. Its totient is φ = 9411584.

The previous prime is 19380367. The next prime is 19380407. The reversal of 19380404 is 40408391.

It can be written as a sum of positive squares in 4 ways, for example, as 2896804 + 16483600 = 1702^2 + 4060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19380407) 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, 23552 + ... + 24360.

It is an arithmetic number, because the mean of its divisors is an integer number (1454355).

Almost surely, 2^19380404 is an apocalyptic number.

It is an amenable number.

19380404 is a deficient number, since it is larger than the sum of its proper divisors (15524116).

19380404 is a wasteful number, since it uses less digits than its factorization.

19380404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 19380404 is about 4402.3180257678. The cubic root of 19380404 is about 268.6092362541.

Adding to 19380404 its reverse (40408391), we get a palindrome (59788795).

The spelling of 19380404 in words is "nineteen million, three hundred eighty thousand, four hundred four".