1938819445 has 8 divisors (see below), whose sum is σ = 2331611136. Its totient is φ = 1547703696.

The previous prime is 1938819397. The next prime is 1938819457. The reversal of 1938819445 is 5449188391.

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

It is a cyclic number.

It is not a de Polignac number, because 1938819445 - 2¹³ = 1938811253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1938819392 and 1938819401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416437 + ... + 421066.

It is an arithmetic number, because the mean of its divisors is an integer number (291451392).

Almost surely, 2^1938819445 is an apocalyptic number.

It is an amenable number.

1938819445 is a deficient number, since it is larger than the sum of its proper divisors (392791691).

1938819445 is an equidigital number, since it uses as much as digits as its factorization.

1938819445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837971.

The product of its digits is 1244160, while the sum is 52.

The square root of 1938819445 is about 44032.0274913613. The cubic root of 1938819445 is about 1246.9406667593.

The spelling of 1938819445 in words is "one billion, nine hundred thirty-eight million, eight hundred nineteen thousand, four hundred forty-five".