1189889760 has 48 divisors (see below), whose sum is σ = 3748154256. Its totient is φ = 317303808.

The previous prime is 1189889737. The next prime is 1189889761. The reversal of 1189889760 is 679889811.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1189889760.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189889761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238989 + ... + 1239948.

It is an arithmetic number, because the mean of its divisors is an integer number (78086547).

Almost surely, 2^1189889760 is an apocalyptic number.

1189889760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189889760 is an abundant number, since it is smaller than the sum of its proper divisors (2558264496).

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

1189889760 is a wasteful number, since it uses less digits than its factorization.

1189889760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478955 (or 2478947 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 57.

The square root of 1189889760 is about 34494.7787353391. The cubic root of 1189889760 is about 1059.6657780995.

The spelling of 1189889760 in words is "one billion, one hundred eighty-nine million, eight hundred eighty-nine thousand, seven hundred sixty".