1189498086 has 96 divisors (see below), whose sum is σ = 3055822848. Its totient is φ = 327231360.

The previous prime is 1189498069. The next prime is 1189498087. The reversal of 1189498086 is 6808949811.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189498087) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 909445 + ... + 910751.

It is an arithmetic number, because the mean of its divisors is an integer number (31831488).

Almost surely, 2^1189498086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1189498086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527911424).

1189498086 is an abundant number, since it is smaller than the sum of its proper divisors (1866324762).

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

1189498086 is a wasteful number, since it uses less digits than its factorization.

1189498086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1189498086 is about 34489.1009740759. The cubic root of 1189498086 is about 1059.5494958757.

The spelling of 1189498086 in words is "one billion, one hundred eighty-nine million, four hundred ninety-eight thousand, eighty-six".