1198155908 has 12 divisors (see below), whose sum is σ = 2128068432. Its totient is φ = 590136360.

The previous prime is 1198155901. The next prime is 1198155919. The reversal of 1198155908 is 8095518911.

It is not an unprimeable number, because it can be changed into a prime (1198155901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235098 + ... + 2235633.

It is an arithmetic number, because the mean of its divisors is an integer number (177339036).

Almost surely, 2^1198155908 is an apocalyptic number.

It is an amenable number.

1198155908 is a deficient number, since it is larger than the sum of its proper divisors (929912524).

1198155908 is a wasteful number, since it uses less digits than its factorization.

1198155908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470802 (or 4470800 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 47.

The square root of 1198155908 is about 34614.3887422557. The cubic root of 1198155908 is about 1062.1139456145.

The spelling of 1198155908 in words is "one billion, one hundred ninety-eight million, one hundred fifty-five thousand, nine hundred eight".