11965220 has 12 divisors (see below), whose sum is σ = 25127004. Its totient is φ = 4786080.

The previous prime is 11965207. The next prime is 11965237. The reversal of 11965220 is 2256911.

It can be written as a sum of positive squares in 2 ways, for example, as 1763584 + 10201636 = 1328^2 + 3194^2 .

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 11965220.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 299111 + ... + 299150.

It is an arithmetic number, because the mean of its divisors is an integer number (2093917).

Almost surely, 2^11965220 is an apocalyptic number.

11965220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11965220 is an abundant number, since it is smaller than the sum of its proper divisors (13161784).

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

11965220 is a wasteful number, since it uses less digits than its factorization.

11965220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598270 (or 598268 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 11965220 is about 3459.0779118141. The cubic root of 11965220 is about 228.7214502476.

The spelling of 11965220 in words is "eleven million, nine hundred sixty-five thousand, two hundred twenty".