1189455120 has 480 divisors, whose sum is σ = 4932255744. Its totient is φ = 250905600.

The previous prime is 1189455107. The next prime is 1189455161. The reversal of 1189455120 is 215549811.

1189455120 is a `hidden beast` number, since 1 + 1 + 89 + 4 + 551 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 3593355 + ... + 3593685.

Almost surely, 2^1189455120 is an apocalyptic number.

1189455120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189455120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466127872).

1189455120 is an abundant number, since it is smaller than the sum of its proper divisors (3742800624).

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

1189455120 is a wasteful number, since it uses less digits than its factorization.

1189455120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1189455120 is about 34488.4780760184. The cubic root of 1189455120 is about 1059.5367383515.

The spelling of 1189455120 in words is "one billion, one hundred eighty-nine million, four hundred fifty-five thousand, one hundred twenty".