1938143064 has 128 divisors (see below), whose sum is σ = 5876398080. Its totient is φ = 524620800.

The previous prime is 1938143059. The next prime is 1938143083. The reversal of 1938143064 is 4603418391.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 97284 + ... + 115500.

It is an arithmetic number, because the mean of its divisors is an integer number (45909360).

Almost surely, 2^1938143064 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 1938143064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938199040).

1938143064 is an abundant number, since it is smaller than the sum of its proper divisors (3938255016).

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

1938143064 is a wasteful number, since it uses less digits than its factorization.

1938143064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18281 (or 18277 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1938143064 is about 44024.3462643115. The cubic root of 1938143064 is about 1246.7956463666.

It can be divided in two parts, 193814 and 3064, that added together give a triangular number (196878 = T₆₂₇).

The spelling of 1938143064 in words is "one billion, nine hundred thirty-eight million, one hundred forty-three thousand, sixty-four".