1198775808 has 160 divisors (see below), whose sum is σ = 3757929120. Its totient is φ = 376012800.

The previous prime is 1198775807. The next prime is 1198775821. The reversal of 1198775808 is 8085778911.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198775807) 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, 232458 + ... + 237558.

It is an arithmetic number, because the mean of its divisors is an integer number (23487057).

Almost surely, 2^1198775808 is an apocalyptic number.

1198775808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198775808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878964560).

1198775808 is an abundant number, since it is smaller than the sum of its proper divisors (2559153312).

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

1198775808 is an equidigital number, since it uses as much as digits as its factorization.

1198775808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145 (or 5123 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The square root of 1198775808 is about 34623.3419530813. The cubic root of 1198775808 is about 1062.2970856424.

The spelling of 1198775808 in words is "one billion, one hundred ninety-eight million, seven hundred seventy-five thousand, eight hundred eight".