1189391616 has 216 divisors, whose sum is σ = 4055950080. Its totient is φ = 327979008.

The previous prime is 1189391611. The next prime is 1189391633. The reversal of 1189391616 is 6161939811.

It is a super-2 number, since 2×1189391616² = 2829304832422182912, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189391611) 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, 466441 + ... + 468983.

Almost surely, 2^1189391616 is an apocalyptic number.

1189391616 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 1189391616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027975040).

1189391616 is an abundant number, since it is smaller than the sum of its proper divisors (2866558464).

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

1189391616 is a wasteful number, since it uses less digits than its factorization.

1189391616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601 (or 2584 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 1189391616 is about 34487.5574084336. The cubic root of 1189391616 is about 1059.5178820933.

The spelling of 1189391616 in words is "one billion, one hundred eighty-nine million, three hundred ninety-one thousand, six hundred sixteen".