11727980 has 24 divisors (see below), whose sum is σ = 26868240. Its totient is φ = 4264640.

The previous prime is 11727971. The next prime is 11728007. The reversal of 11727980 is 8972711.

It is a self number, because there is not a number n which added to its sum of digits gives 11727980.

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, 26435 + ... + 26874.

It is an arithmetic number, because the mean of its divisors is an integer number (1119510).

Almost surely, 2^11727980 is an apocalyptic number.

11727980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11727980 is an abundant number, since it is smaller than the sum of its proper divisors (15140260).

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

11727980 is a wasteful number, since it uses less digits than its factorization.

11727980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53329 (or 53327 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 11727980 is about 3424.6138468446. The cubic root of 11727980 is about 227.1996923143.

The spelling of 11727980 in words is "eleven million, seven hundred twenty-seven thousand, nine hundred eighty".