192121384 has 64 divisors (see below), whose sum is σ = 457712640. Its totient is φ = 73543680.

The previous prime is 192121381. The next prime is 192121393. The reversal of 192121384 is 483121291.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (192121381) 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 15 ways as a sum of consecutive naturals, for example, 18312 + ... + 26824.

It is an arithmetic number, because the mean of its divisors is an integer number (7151760).

Almost surely, 2^192121384 is an apocalyptic number.

192121384 is a gapful number since it is divisible by the number (14) 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 192121384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228856320).

192121384 is an abundant number, since it is smaller than the sum of its proper divisors (265591256).

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

192121384 is a wasteful number, since it uses less digits than its factorization.

192121384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570 (or 8566 counting only the distinct ones).

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

The square root of 192121384 is about 13860.7858363081. The cubic root of 192121384 is about 577.0213761383.

The spelling of 192121384 in words is "one hundred ninety-two million, one hundred twenty-one thousand, three hundred eighty-four".