1338809472 has 768 divisors, whose sum is σ = 5489003520. Its totient is φ = 313528320.

The previous prime is 1338809387. The next prime is 1338809491. The reversal of 1338809472 is 2749088331.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31135083 + ... + 31135125.

It is an arithmetic number, because the mean of its divisors is an integer number (7147140).

Almost surely, 2^1338809472 is an apocalyptic number.

1338809472 is a gapful number since it is divisible by the number (12) 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 1338809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2744501760).

1338809472 is an abundant number, since it is smaller than the sum of its proper divisors (4150194048).

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

1338809472 is a wasteful number, since it uses less digits than its factorization.

1338809472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1338809472 is about 36589.7454486909. The cubic root of 1338809472 is about 1102.1471757302.

The spelling of 1338809472 in words is "one billion, three hundred thirty-eight million, eight hundred nine thousand, four hundred seventy-two".