1383378868 has 12 divisors (see below), whose sum is σ = 2479959972. Its totient is φ = 674818880.

The previous prime is 1383378853. The next prime is 1383378877. The reversal of 1383378868 is 8688733831.

It can be written as a sum of positive squares in 2 ways, for example, as 21178404 + 1362200464 = 4602^2 + 36908^2 .

It is a super-2 number, since 2×1383378868² = 3827474184857922848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217455 + ... + 4217782.

It is an arithmetic number, because the mean of its divisors is an integer number (206663331).

Almost surely, 2^1383378868 is an apocalyptic number.

It is an amenable number.

1383378868 is a deficient number, since it is larger than the sum of its proper divisors (1096581104).

1383378868 is a wasteful number, since it uses less digits than its factorization.

1383378868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435282 (or 8435280 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The square root of 1383378868 is about 37193.8014728261. The cubic root of 1383378868 is about 1114.2441922194.

The spelling of 1383378868 in words is "one billion, three hundred eighty-three million, three hundred seventy-eight thousand, eight hundred sixty-eight".