1189788404 has 36 divisors (see below), whose sum is σ = 2432557764. Its totient is φ = 507701376.

The previous prime is 1189788403. The next prime is 1189788407. The reversal of 1189788404 is 4048879811.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 628003600 + 561784804 = 25060^2 + 23702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189788403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32642 + ... + 58694.

It is an arithmetic number, because the mean of its divisors is an integer number (67571049).

Almost surely, 2^1189788404 is an apocalyptic number.

1189788404 is a gapful number since it is divisible by the number (14) 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 1189788404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216278882).

1189788404 is an abundant number, since it is smaller than the sum of its proper divisors (1242769360).

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

1189788404 is a wasteful number, since it uses less digits than its factorization.

1189788404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26304 (or 26295 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 1189788404 is about 34493.3095541730. The cubic root of 1189788404 is about 1059.6356894482.

The spelling of 1189788404 in words is "one billion, one hundred eighty-nine million, seven hundred eighty-eight thousand, four hundred four".