1199043128 has 8 divisors (see below), whose sum is σ = 2248205880. Its totient is φ = 599521560.

The previous prime is 1199043121. The next prime is 1199043137. The reversal of 1199043128 is 8213409911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1199043091 and 1199043100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199043121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74940188 + ... + 74940203.

It is an arithmetic number, because the mean of its divisors is an integer number (281025735).

Almost surely, 2^1199043128 is an apocalyptic number.

It is an amenable number.

1199043128 is a deficient number, since it is larger than the sum of its proper divisors (1049162752).

1199043128 is a wasteful number, since it uses less digits than its factorization.

1199043128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149880397 (or 149880393 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1199043128 is about 34627.2021393586. The cubic root of 1199043128 is about 1062.3760417879.

The spelling of 1199043128 in words is "one billion, one hundred ninety-nine million, forty-three thousand, one hundred twenty-eight".