1938401916 has 24 divisors (see below), whose sum is σ = 4934114304. Its totient is φ = 587394480.

The previous prime is 1938401911. The next prime is 1938401939. The reversal of 1938401916 is 6191048391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938401911) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7342300 + ... + 7342563.

It is an arithmetic number, because the mean of its divisors is an integer number (205588096).

Almost surely, 2^1938401916 is an apocalyptic number.

It is an amenable number.

1938401916 is an abundant number, since it is smaller than the sum of its proper divisors (2995712388).

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

1938401916 is a wasteful number, since it uses less digits than its factorization.

1938401916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14684881 (or 14684879 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1938401916 is about 44027.2860394551. The cubic root of 1938401916 is about 1246.8511498682.

The spelling of 1938401916 in words is "one billion, nine hundred thirty-eight million, four hundred one thousand, nine hundred sixteen".