1189846660 has 48 divisors (see below), whose sum is σ = 2671930800. Its totient is φ = 443494400.

The previous prime is 1189846657. The next prime is 1189846739. The reversal of 1189846660 is 666489811.

It can be written as a sum of positive squares in 8 ways, for example, as 44836416 + 1145010244 = 6696^2 + 33838^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17016 + ... + 51664.

It is an arithmetic number, because the mean of its divisors is an integer number (55665225).

Almost surely, 2^1189846660 is an apocalyptic number.

1189846660 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 1189846660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1335965400).

1189846660 is an abundant number, since it is smaller than the sum of its proper divisors (1482084140).

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

1189846660 is a wasteful number, since it uses less digits than its factorization.

1189846660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34776 (or 34774 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1189846660 is about 34494.1539974530. The cubic root of 1189846660 is about 1059.6529835959.

The spelling of 1189846660 in words is "one billion, one hundred eighty-nine million, eight hundred forty-six thousand, six hundred sixty".