1189989936 has 120 divisors (see below), whose sum is σ = 3575061360. Its totient is φ = 368160768.

The previous prime is 1189989887. The next prime is 1189989937. The reversal of 1189989936 is 6399899811.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1189989937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175375 + ... + 182033.

It is an arithmetic number, because the mean of its divisors is an integer number (29792178).

Almost surely, 2^1189989936 is an apocalyptic number.

1189989936 is a gapful number since it is divisible by the number (16) 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 1189989936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787530680).

1189989936 is an abundant number, since it is smaller than the sum of its proper divisors (2385071424).

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

1189989936 is a wasteful number, since it uses less digits than its factorization.

1189989936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763 (or 6754 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 63.

The square root of 1189989936 is about 34496.2307506197. The cubic root of 1189989936 is about 1059.6955147759.

The spelling of 1189989936 in words is "one billion, one hundred eighty-nine million, nine hundred eighty-nine thousand, nine hundred thirty-six".