1189449198 has 40 divisors (see below), whose sum is σ = 3045999792. Its totient is φ = 339842304.

The previous prime is 1189449193. The next prime is 1189449223. The reversal of 1189449198 is 8919449811.

1189449198 is a `hidden beast` number, since 1 + 1 + 8 + 9 + 449 + 198 = 666.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189449193) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 523315 + ... + 525582.

Almost surely, 2^1189449198 is an apocalyptic number.

1189449198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1189449198 is an abundant number, since it is smaller than the sum of its proper divisors (1856550594).

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

1189449198 is a wasteful number, since it uses less digits than its factorization.

1189449198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048918 (or 1048909 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 1189449198 is about 34488.3922211517. The cubic root of 1189449198 is about 1059.5349799590.

The spelling of 1189449198 in words is "one billion, one hundred eighty-nine million, four hundred forty-nine thousand, one hundred ninety-eight".