1338451989 has 16 divisors (see below), whose sum is σ = 2054223360. Its totient is φ = 759325680.

The previous prime is 1338451987. The next prime is 1338451997. The reversal of 1338451989 is 9891548331.

It is not a de Polignac number, because 1338451989 - 2¹ = 1338451987 is a prime.

It is a super-2 number, since 2×1338451989² = 3582907453716112242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338451987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226347 + ... + 232184.

It is an arithmetic number, because the mean of its divisors is an integer number (128388960).

Almost surely, 2^1338451989 is an apocalyptic number.

It is an amenable number.

1338451989 is a deficient number, since it is larger than the sum of its proper divisors (715771371).

1338451989 is a wasteful number, since it uses less digits than its factorization.

1338451989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458680.

The product of its digits is 933120, while the sum is 51.

The square root of 1338451989 is about 36584.8601063336. The cubic root of 1338451989 is about 1102.0490701720.

The spelling of 1338451989 in words is "one billion, three hundred thirty-eight million, four hundred fifty-one thousand, nine hundred eighty-nine".