193928138 has 8 divisors (see below), whose sum is σ = 291241440. Its totient is φ = 96847660.

The previous prime is 193928131. The next prime is 193928149. The reversal of 193928138 is 831829391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (193928131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56108 + ... + 59463.

It is an arithmetic number, because the mean of its divisors is an integer number (36405180).

Almost surely, 2^193928138 is an apocalyptic number.

193928138 is a deficient number, since it is larger than the sum of its proper divisors (97313302).

193928138 is a wasteful number, since it uses less digits than its factorization.

193928138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116412.

The product of its digits is 93312, while the sum is 44.

The square root of 193928138 is about 13925.8083427857. The cubic root of 193928138 is about 578.8245496380.

The spelling of 193928138 in words is "one hundred ninety-three million, nine hundred twenty-eight thousand, one hundred thirty-eight".