1378908838 has 12 divisors (see below), whose sum is σ = 2079359100. Its totient is φ = 685808420.

The previous prime is 1378908833. The next prime is 1378908841. The reversal of 1378908838 is 8388098731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378908833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63513 + ... + 82411.

It is an arithmetic number, because the mean of its divisors is an integer number (173279925).

Almost surely, 2^1378908838 is an apocalyptic number.

1378908838 is a deficient number, since it is larger than the sum of its proper divisors (700450262).

1378908838 is an equidigital number, since it uses as much as digits as its factorization.

1378908838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19283 (or 19092 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 1378908838 is about 37133.6617908873. The cubic root of 1378908838 is about 1113.0427668901.

It can be divided in two parts, 13789088 and 38, that added together give a triangular number (13789126 = T₅₂₅₁).

The spelling of 1378908838 in words is "one billion, three hundred seventy-eight million, nine hundred eight thousand, eight hundred thirty-eight".