192421138 has 48 divisors (see below), whose sum is σ = 366712920. Its totient is φ = 75043584.

The previous prime is 192421109. The next prime is 192421157. The reversal of 192421138 is 831124291.

It can be written as a sum of positive squares in 4 ways, for example, as 104305369 + 88115769 = 10213^2 + 9387^2 .

192421138 is a modest number, since divided by 21138 gives 1924 as remainder.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 91968 + ... + 94036.

Almost surely, 2^192421138 is an apocalyptic number.

192421138 is a deficient number, since it is larger than the sum of its proper divisors (174291782).

192421138 is a wasteful number, since it uses less digits than its factorization.

192421138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171 (or 2164 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 192421138 is about 13871.5946451733. The cubic root of 192421138 is about 577.3213160078.

The spelling of 192421138 in words is "one hundred ninety-two million, four hundred twenty-one thousand, one hundred thirty-eight".