1338188945 has 8 divisors (see below), whose sum is σ = 1606086144. Its totient is φ = 1070378224.

The previous prime is 1338188933. The next prime is 1338188987. The reversal of 1338188945 is 5498818331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1338188945 - 2²⁶ = 1271080081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1338188893 and 1338188902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19562 + ... + 55308.

It is an arithmetic number, because the mean of its divisors is an integer number (200760768).

Almost surely, 2^1338188945 is an apocalyptic number.

It is an amenable number.

1338188945 is a deficient number, since it is larger than the sum of its proper divisors (267897199).

1338188945 is an equidigital number, since it uses as much as digits as its factorization.

1338188945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43239.

The product of its digits is 829440, while the sum is 50.

The square root of 1338188945 is about 36581.2649453241. The cubic root of 1338188945 is about 1101.9768707480.

The spelling of 1338188945 in words is "one billion, three hundred thirty-eight million, one hundred eighty-eight thousand, nine hundred forty-five".