1338958668 has 24 divisors (see below), whose sum is σ = 3125606400. Its totient is φ = 446123920.

The previous prime is 1338958667. The next prime is 1338958711. The reversal of 1338958668 is 8668598331.

It is a super-2 number, since 2×1338958668² = 3585620629224668448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1338958661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5533 + ... + 52043.

It is an arithmetic number, because the mean of its divisors is an integer number (130233600).

Almost surely, 2^1338958668 is an apocalyptic number.

It is an amenable number.

1338958668 is an abundant number, since it is smaller than the sum of its proper divisors (1786647732).

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

1338958668 is a wasteful number, since it uses less digits than its factorization.

1338958668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48917 (or 48915 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The square root of 1338958668 is about 36591.7841598357. The cubic root of 1338958668 is about 1102.1881150488.

The spelling of 1338958668 in words is "one billion, three hundred thirty-eight million, nine hundred fifty-eight thousand, six hundred sixty-eight".