1378101438 has 80 divisors (see below), whose sum is σ = 3574010880. Its totient is φ = 388733904.

The previous prime is 1378101437. The next prime is 1378101503. The reversal of 1378101438 is 8341018731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378101437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 81895 + ... + 97277.

It is an arithmetic number, because the mean of its divisors is an integer number (44675136).

Almost surely, 2^1378101438 is an apocalyptic number.

1378101438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378101438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787005440).

1378101438 is an abundant number, since it is smaller than the sum of its proper divisors (2195909442).

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

1378101438 is a wasteful number, since it uses less digits than its factorization.

1378101438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15483 (or 15474 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1378101438 is about 37122.7886614139. The cubic root of 1378101438 is about 1112.8254824780.

The spelling of 1378101438 in words is "one billion, three hundred seventy-eight million, one hundred one thousand, four hundred thirty-eight".