1384781838 has 96 divisors (see below), whose sum is σ = 3206504448. Its totient is φ = 397615680.

The previous prime is 1384781831. The next prime is 1384781851. The reversal of 1384781838 is 8381874831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384781831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2120320 + ... + 2120972.

It is an arithmetic number, because the mean of its divisors is an integer number (33401088).

Almost surely, 2^1384781838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1384781838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603252224).

1384781838 is an abundant number, since it is smaller than the sum of its proper divisors (1821722610).

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

1384781838 is a wasteful number, since it uses less digits than its factorization.

1384781838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 819 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The square root of 1384781838 is about 37212.6569596959. The cubic root of 1384781838 is about 1114.6207395859.

The spelling of 1384781838 in words is "one billion, three hundred eighty-four million, seven hundred eighty-one thousand, eight hundred thirty-eight".