1938042450 has 180 divisors, whose sum is σ = 5586776910. Its totient is φ = 498113280.

The previous prime is 1938042437. The next prime is 1938042451. The reversal of 1938042450 is 542408391.

1938042450 is a `hidden beast` number, since 1 + 93 + 80 + 42 + 450 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 16184529 + 1921857921 = 4023^2 + 43839^2 .

It is not an unprimeable number, because it can be changed into a prime (1938042451) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 3405766 + ... + 3406334.

Almost surely, 2^1938042450 is an apocalyptic number.

1938042450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938042450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2793388455).

1938042450 is an abundant number, since it is smaller than the sum of its proper divisors (3648734460).

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

1938042450 is a wasteful number, since it uses less digits than its factorization.

1938042450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1938042450 is about 44023.2035408601. The cubic root of 1938042450 is about 1246.7740712019.

The spelling of 1938042450 in words is "one billion, nine hundred thirty-eight million, forty-two thousand, four hundred fifty".