11800720 has 40 divisors (see below), whose sum is σ = 29053944. Its totient is φ = 4442112.

The previous prime is 11800717. The next prime is 11800753. The reversal of 11800720 is 2700811.

It can be written as a sum of positive squares in 4 ways, for example, as 1354896 + 10445824 = 1164^2 + 3232^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2979 + ... + 5698.

Almost surely, 2^11800720 is an apocalyptic number.

11800720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11800720 is an abundant number, since it is smaller than the sum of its proper divisors (17253224).

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

11800720 is a wasteful number, since it uses less digits than its factorization.

11800720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8707 (or 8701 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 11800720 is about 3435.2176059167. The cubic root of 11800720 is about 227.6684418525.

Subtracting from 11800720 its reverse (2700811), we obtain a palindrome (9099909).

The spelling of 11800720 in words is "eleven million, eight hundred thousand, seven hundred twenty".