1198139908 has 24 divisors (see below), whose sum is σ = 2406756800. Its totient is φ = 511243488.

The previous prime is 1198139879. The next prime is 1198139909. The reversal of 1198139908 is 8099318911.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1198139909) 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, 87018 + ... + 99841.

Almost surely, 2^1198139908 is an apocalyptic number.

It is an amenable number.

1198139908 is an abundant number, since it is smaller than the sum of its proper divisors (1208616892).

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

1198139908 is a wasteful number, since it uses less digits than its factorization.

1198139908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187099 (or 187097 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 49.

The square root of 1198139908 is about 34614.1576237239. The cubic root of 1198139908 is about 1062.1092178216.

The spelling of 1198139908 in words is "one billion, one hundred ninety-eight million, one hundred thirty-nine thousand, nine hundred eight".