1198684128 has 24 divisors (see below), whose sum is σ = 3146546088. Its totient is φ = 399561344.

The previous prime is 1198684121. The next prime is 1198684171. The reversal of 1198684128 is 8214868911.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198684121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6243051 + ... + 6243242.

It is an arithmetic number, because the mean of its divisors is an integer number (131106087).

Almost surely, 2^1198684128 is an apocalyptic number.

It is an amenable number.

1198684128 is an abundant number, since it is smaller than the sum of its proper divisors (1947861960).

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

1198684128 is a wasteful number, since it uses less digits than its factorization.

1198684128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12486306 (or 12486298 counting only the distinct ones).

The product of its digits is 221184, while the sum is 48.

The square root of 1198684128 is about 34622.0179654508. The cubic root of 1198684128 is about 1062.2700041595.

The spelling of 1198684128 in words is "one billion, one hundred ninety-eight million, six hundred eighty-four thousand, one hundred twenty-eight".