1938161092 has 72 divisors (see below), whose sum is σ = 4248871200. Its totient is φ = 768450816.

The previous prime is 1938161087. The next prime is 1938161107. The reversal of 1938161092 is 2901618391.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191659 + ... + 201517.

It is an arithmetic number, because the mean of its divisors is an integer number (59012100).

Almost surely, 2^1938161092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938161092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124435600).

1938161092 is an abundant number, since it is smaller than the sum of its proper divisors (2310710108).

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

1938161092 is a wasteful number, since it uses less digits than its factorization.

1938161092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953 (or 9944 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1938161092 is about 44024.5510141784. The cubic root of 1938161092 is about 1246.7995121222.

The spelling of 1938161092 in words is "one billion, nine hundred thirty-eight million, one hundred sixty-one thousand, ninety-two".