11520780 has 24 divisors (see below), whose sum is σ = 32258352. Its totient is φ = 3072192.

The previous prime is 11520763. The next prime is 11520791. The reversal of 11520780 is 8702511.

It is a self number, because there is not a number n which added to its sum of digits gives 11520780.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95947 + ... + 96066.

It is an arithmetic number, because the mean of its divisors is an integer number (1344098).

Almost surely, 2^11520780 is an apocalyptic number.

11520780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11520780 is an abundant number, since it is smaller than the sum of its proper divisors (20737572).

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

11520780 is a wasteful number, since it uses less digits than its factorization.

11520780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192025 (or 192023 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 11520780 is about 3394.2274526024. The cubic root of 11520780 is about 225.8537440949.

The spelling of 11520780 in words is "eleven million, five hundred twenty thousand, seven hundred eighty".