11799720 has 96 divisors (see below), whose sum is σ = 38961000. Its totient is φ = 3096576.

The previous prime is 11799659. The next prime is 11799721. The reversal of 11799720 is 2799711.

It can be written as a sum of positive squares in 4 ways, for example, as 10227204 + 1572516 = 3198^2 + 1254^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11799721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26056 + ... + 26504.

Almost surely, 2^11799720 is an apocalyptic number.

11799720 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 11799720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19480500).

11799720 is an abundant number, since it is smaller than the sum of its proper divisors (27161280).

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

11799720 is a wasteful number, since it uses less digits than its factorization.

11799720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 11799720 is about 3435.0720516461. The cubic root of 11799720 is about 227.6620107513.

Subtracting from 11799720 its reverse (2799711), we obtain a palindrome (9000009).

The spelling of 11799720 in words is "eleven million, seven hundred ninety-nine thousand, seven hundred twenty".