11720900 has 18 divisors (see below), whose sum is σ = 25434570. Its totient is φ = 4688320.

The previous prime is 11720899. The next prime is 11720903. The reversal of 11720900 is 902711.

11720900 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 3 ways, for example, as 10816 + 11710084 = 104^2 + 3422^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (11720903) 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 5 ways as a sum of consecutive naturals, for example, 58505 + ... + 58704.

Almost surely, 2^11720900 is an apocalyptic number.

11720900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11720900 is an abundant number, since it is smaller than the sum of its proper divisors (13713670).

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

11720900 is a wasteful number, since it uses less digits than its factorization.

11720900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117223 (or 117216 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 11720900 is about 3423.5799976048. The cubic root of 11720900 is about 227.1539641320.

The spelling of 11720900 in words is "eleven million, seven hundred twenty thousand, nine hundred".