1189418890 has 32 divisors (see below), whose sum is σ = 2338689024. Its totient is φ = 431941440.

The previous prime is 1189418863. The next prime is 1189418899. The reversal of 1189418890 is 988149811.

1189418890 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1189418899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80887 + ... + 94453.

It is an arithmetic number, because the mean of its divisors is an integer number (73084032).

Almost surely, 2^1189418890 is an apocalyptic number.

1189418890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1189418890 is a deficient number, since it is larger than the sum of its proper divisors (1149270134).

1189418890 is a wasteful number, since it uses less digits than its factorization.

1189418890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14382.

The product of its (nonzero) digits is 165888, while the sum is 49.

The square root of 1189418890 is about 34487.9528241385. The cubic root of 1189418890 is about 1059.5259806510.

The spelling of 1189418890 in words is "one billion, one hundred eighty-nine million, four hundred eighteen thousand, eight hundred ninety".