1189936650 has 192 divisors, whose sum is σ = 3507989760. Its totient is φ = 261273600.

The previous prime is 1189936639. The next prime is 1189936667. The reversal of 1189936650 is 566399811.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1189936650.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 4234510 + ... + 4234790.

It is an arithmetic number, because the mean of its divisors is an integer number (18270780).

Almost surely, 2^1189936650 is an apocalyptic number.

1189936650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189936650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753994880).

1189936650 is an abundant number, since it is smaller than the sum of its proper divisors (2318053110).

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

1189936650 is a wasteful number, since it uses less digits than its factorization.

1189936650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1189936650 is about 34495.4583967223. The cubic root of 1189936650 is about 1059.6796973373.

The spelling of 1189936650 in words is "one billion, one hundred eighty-nine million, nine hundred thirty-six thousand, six hundred fifty".