11800840 has 64 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 4435200.

The previous prime is 11800837. The next prime is 11800847. The reversal of 11800840 is 4800811.

It is not an unprimeable number, because it can be changed into a prime (11800847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92857 + ... + 92983.

It is an arithmetic number, because the mean of its divisors is an integer number (440640).

Almost surely, 2^11800840 is an apocalyptic number.

11800840 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 11800840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14100480).

11800840 is an abundant number, since it is smaller than the sum of its proper divisors (16400120).

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

11800840 is a wasteful number, since it uses less digits than its factorization.

11800840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 11800840 is about 3435.2350720147. The cubic root of 11800840 is about 227.6692135602.

The spelling of 11800840 in words is "eleven million, eight hundred thousand, eight hundred forty".