1938319854 has 32 divisors (see below), whose sum is σ = 3974412960. Its totient is φ = 629836800.

The previous prime is 1938319843. The next prime is 1938319883. The reversal of 1938319854 is 4589138391.

It is a junction number, because it is equal to n+sod(n) for n = 1938319797 and 1938319806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408214 + ... + 412934.

It is an arithmetic number, because the mean of its divisors is an integer number (124200405).

Almost surely, 2^1938319854 is an apocalyptic number.

1938319854 is an abundant number, since it is smaller than the sum of its proper divisors (2036093106).

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

1938319854 is a wasteful number, since it uses less digits than its factorization.

1938319854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436.

The product of its digits is 933120, while the sum is 51.

The square root of 1938319854 is about 44026.3540847979. The cubic root of 1938319854 is about 1246.8335545247.

The spelling of 1938319854 in words is "one billion, nine hundred thirty-eight million, three hundred nineteen thousand, eight hundred fifty-four".