1189628440 has 384 divisors, whose sum is σ = 3769879680. Its totient is φ = 328458240.

The previous prime is 1189628381. The next prime is 1189628543. The reversal of 1189628440 is 448269811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16296244 + ... + 16296316.

It is an arithmetic number, because the mean of its divisors is an integer number (9817395).

Almost surely, 2^1189628440 is an apocalyptic number.

1189628440 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 1189628440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1884939840).

1189628440 is an abundant number, since it is smaller than the sum of its proper divisors (2580251240).

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

1189628440 is a wasteful number, since it uses less digits than its factorization.

1189628440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 1189628440 is about 34490.9907077196. The cubic root of 1189628440 is about 1059.5881988860.

The spelling of 1189628440 in words is "one billion, one hundred eighty-nine million, six hundred twenty-eight thousand, four hundred forty".