193920404 has 24 divisors (see below), whose sum is σ = 352010568. Its totient is φ = 93398400.

The previous prime is 193920359. The next prime is 193920413. The reversal of 193920404 is 404029391.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53260804 + 140659600 = 7298^2 + 11860^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8462 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (14667107).

Almost surely, 2^193920404 is an apocalyptic number.

It is an amenable number.

193920404 is a deficient number, since it is larger than the sum of its proper divisors (158090164).

193920404 is a wasteful number, since it uses less digits than its factorization.

193920404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13115 (or 13113 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 193920404 is about 13925.5306541618. The cubic root of 193920404 is about 578.8168548830.

Adding to 193920404 its reverse (404029391), we get a palindrome (597949795).

The spelling of 193920404 in words is "one hundred ninety-three million, nine hundred twenty thousand, four hundred four".