11989000 has 64 divisors (see below), whose sum is σ = 29577600. Its totient is φ = 4536000.

The previous prime is 11988997. The next prime is 11989031. The reversal of 11989000 is 98911.

It is a super-2 number, since 2×11989000² = 287472242000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11989000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18685 + ... + 19315.

It is an arithmetic number, because the mean of its divisors is an integer number (462150).

Almost surely, 2^11989000 is an apocalyptic number.

11989000 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 11989000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14788800).

11989000 is an abundant number, since it is smaller than the sum of its proper divisors (17588600).

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

11989000 is a wasteful number, since it uses less digits than its factorization.

11989000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 11989000 is about 3462.5135378797. The cubic root of 11989000 is about 228.8728723654.

The spelling of 11989000 in words is "eleven million, nine hundred eighty-nine thousand".