1198443438 has 24 divisors (see below), whose sum is σ = 2692799928. Its totient is φ = 399480984.

The previous prime is 1198443427. The next prime is 1198443457. The reversal of 1198443438 is 8343448911.

It is a junction number, because it is equal to n+sod(n) for n = 1198443393 and 1198443402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1232481 + ... + 1233452.

It is an arithmetic number, because the mean of its divisors is an integer number (112199997).

Almost surely, 2^1198443438 is an apocalyptic number.

1198443438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1198443438 is an abundant number, since it is smaller than the sum of its proper divisors (1494356490).

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

1198443438 is an equidigital number, since it uses as much as digits as its factorization.

1198443438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465950 (or 2465938 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1198443438 is about 34618.5418237106. The cubic root of 1198443438 is about 1062.1988998332.

The spelling of 1198443438 in words is "one billion, one hundred ninety-eight million, four hundred forty-three thousand, four hundred thirty-eight".