1383791838 has 64 divisors (see below), whose sum is σ = 3282031872. Its totient is φ = 383431680.

The previous prime is 1383791837. The next prime is 1383791839. The reversal of 1383791838 is 8381973831.

It is an interprime number because it is at equal distance from previous prime (1383791837) and next prime (1383791839).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383791833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84270 + ... + 99342.

It is an arithmetic number, because the mean of its divisors is an integer number (51281748).

Almost surely, 2^1383791838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1383791838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1641015936).

1383791838 is an abundant number, since it is smaller than the sum of its proper divisors (1898240034).

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

1383791838 is a wasteful number, since it uses less digits than its factorization.

1383791838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15209.

The product of its digits is 870912, while the sum is 51.

The square root of 1383791838 is about 37199.3526556579. The cubic root of 1383791838 is about 1114.3550569179.

The spelling of 1383791838 in words is "one billion, three hundred eighty-three million, seven hundred ninety-one thousand, eight hundred thirty-eight".