1189005890 has 8 divisors (see below), whose sum is σ = 2140210620. Its totient is φ = 475602352.

The previous prime is 1189005871. The next prime is 1189005901. The reversal of 1189005890 is 985009811.

It can be written as a sum of positive squares in 2 ways, for example, as 1182740881 + 6265009 = 34391^2 + 2503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59450285 + ... + 59450304.

Almost surely, 2^1189005890 is an apocalyptic number.

1189005890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1189005890 is a deficient number, since it is larger than the sum of its proper divisors (951204730).

1189005890 is a wasteful number, since it uses less digits than its factorization.

1189005890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118900596.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 1189005890 is about 34481.9647062055. The cubic root of 1189005890 is about 1059.4033339562.

The spelling of 1189005890 in words is "one billion, one hundred eighty-nine million, five thousand, eight hundred ninety".