192138408 has 144 divisors (see below), whose sum is σ = 660497760. Its totient is φ = 49896000.

The previous prime is 192138407. The next prime is 192138439. The reversal of 192138408 is 804831291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (192138407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 36333 + ... + 41283.

It is an arithmetic number, because the mean of its divisors is an integer number (4586790).

Almost surely, 2^192138408 is an apocalyptic number.

192138408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 192138408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330248880).

192138408 is an abundant number, since it is smaller than the sum of its proper divisors (468359352).

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

192138408 is a wasteful number, since it uses less digits than its factorization.

192138408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988 (or 4974 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 192138408 is about 13861.3999293001. The cubic root of 192138408 is about 577.0384190473.

Adding to 192138408 its reverse (804831291), we get a palindrome (996969699).

The spelling of 192138408 in words is "one hundred ninety-two million, one hundred thirty-eight thousand, four hundred eight".