11865000 has 160 divisors (see below), whose sum is σ = 42736320. Its totient is φ = 2688000.

The previous prime is 11864989. The next prime is 11865001. The reversal of 11865000 is 56811.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11865001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104944 + ... + 105056.

It is an arithmetic number, because the mean of its divisors is an integer number (267102).

Almost surely, 2^11865000 is an apocalyptic number.

11865000 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 11865000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21368160).

11865000 is an abundant number, since it is smaller than the sum of its proper divisors (30871320).

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

11865000 is a wasteful number, since it uses less digits than its factorization.

11865000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 11865000 is about 3444.5609299300. The cubic root of 11865000 is about 228.0810730458.

The spelling of 11865000 in words is "eleven million, eight hundred sixty-five thousand".