1188987404 has 12 divisors (see below), whose sum is σ = 2269885128. Its totient is φ = 540448800.

The previous prime is 1188987403. The next prime is 1188987409. The reversal of 1188987404 is 4047898811.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1188987403) 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, 13511177 + ... + 13511264.

It is an arithmetic number, because the mean of its divisors is an integer number (189157094).

Almost surely, 2^1188987404 is an apocalyptic number.

It is an amenable number.

1188987404 is a deficient number, since it is larger than the sum of its proper divisors (1080897724).

1188987404 is a wasteful number, since it uses less digits than its factorization.

1188987404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27022456 (or 27022454 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 1188987404 is about 34481.6966519921. The cubic root of 1188987404 is about 1059.3978435905.

The spelling of 1188987404 in words is "one billion, one hundred eighty-eight million, nine hundred eighty-seven thousand, four hundred four".