1338558945 has 64 divisors (see below), whose sum is σ = 2324574720. Its totient is φ = 655699968.

The previous prime is 1338558877. The next prime is 1338558967. The reversal of 1338558945 is 5498558331.

It is a happy number.

It is not a de Polignac number, because 1338558945 - 2⁷ = 1338558817 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3371487 + ... + 3371883.

It is an arithmetic number, because the mean of its divisors is an integer number (36321480).

Almost surely, 2^1338558945 is an apocalyptic number.

1338558945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1338558945 is a deficient number, since it is larger than the sum of its proper divisors (986015775).

1338558945 is a wasteful number, since it uses less digits than its factorization.

1338558945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its digits is 2592000, while the sum is 51.

The square root of 1338558945 is about 36586.3218293394. The cubic root of 1338558945 is about 1102.0784243866.

The spelling of 1338558945 in words is "one billion, three hundred thirty-eight million, five hundred fifty-eight thousand, nine hundred forty-five".