1378361448 has 80 divisors (see below), whose sum is σ = 3867953760. Its totient is φ = 458589600.

The previous prime is 1378361419. The next prime is 1378361449. The reversal of 1378361448 is 8441638731.

It is not an unprimeable number, because it can be changed into a prime (1378361449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 407203 + ... + 410573.

It is an arithmetic number, because the mean of its divisors is an integer number (48349422).

Almost surely, 2^1378361448 is an apocalyptic number.

1378361448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378361448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933976880).

1378361448 is an abundant number, since it is smaller than the sum of its proper divisors (2489592312).

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

1378361448 is a wasteful number, since it uses less digits than its factorization.

1378361448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4007 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1378361448 is about 37126.2905230242. The cubic root of 1378361448 is about 1112.8954646410.

The spelling of 1378361448 in words is "one billion, three hundred seventy-eight million, three hundred sixty-one thousand, four hundred forty-eight".