1189543680 has 432 divisors, whose sum is σ = 4553377920. Its totient is φ = 286580736.

The previous prime is 1189543679. The next prime is 1189543681. The reversal of 1189543680 is 863459811.

It is an interprime number because it is at equal distance from previous prime (1189543679) and next prime (1189543681).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189543681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25309417 + ... + 25309463.

Almost surely, 2^1189543680 is an apocalyptic number.

1189543680 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 1189543680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2276688960).

1189543680 is an abundant number, since it is smaller than the sum of its proper divisors (3363834240).

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

1189543680 is an equidigital number, since it uses as much as digits as its factorization.

1189543680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1189543680 is about 34489.7619591670. The cubic root of 1189543680 is about 1059.5630333733.

The spelling of 1189543680 in words is "one billion, one hundred eighty-nine million, five hundred forty-three thousand, six hundred eighty".