1189735680 has 216 divisors, whose sum is σ = 4420779552. Its totient is φ = 271896576.

The previous prime is 1189735669. The next prime is 1189735727. The reversal of 1189735680 is 865379811.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184999 + ... + 191321.

It is an arithmetic number, because the mean of its divisors is an integer number (20466572).

Almost surely, 2^1189735680 is an apocalyptic number.

1189735680 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 1189735680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2210389776).

1189735680 is an abundant number, since it is smaller than the sum of its proper divisors (3231043872).

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

1189735680 is an equidigital number, since it uses as much as digits as its factorization.

1189735680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6361 (or 6340 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1189735680 is about 34492.5452815532. The cubic root of 1189735680 is about 1059.6200370691.

The spelling of 1189735680 in words is "one billion, one hundred eighty-nine million, seven hundred thirty-five thousand, six hundred eighty".