1921369338 has 192 divisors, whose sum is σ = 5199667200. Its totient is φ = 500618880.

The previous prime is 1921369327. The next prime is 1921369343. The reversal of 1921369338 is 8339631291.

1921369338 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1921369293 and 1921369302.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8615895 + ... + 8616117.

It is an arithmetic number, because the mean of its divisors is an integer number (27081600).

Almost surely, 2^1921369338 is an apocalyptic number.

1921369338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921369338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2599833600).

1921369338 is an abundant number, since it is smaller than the sum of its proper divisors (3278297862).

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

1921369338 is a wasteful number, since it uses less digits than its factorization.

1921369338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 374 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1921369338 is about 43833.4271760719. The cubic root of 1921369338 is about 1243.1884079670.

The spelling of 1921369338 in words is "one billion, nine hundred twenty-one million, three hundred sixty-nine thousand, three hundred thirty-eight".