11905220 has 12 divisors (see below), whose sum is σ = 25001004. Its totient is φ = 4762080.

The previous prime is 11905217. The next prime is 11905247. The reversal of 11905220 is 2250911.

It can be written as a sum of positive squares in 2 ways, for example, as 6959044 + 4946176 = 2638^2 + 2224^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 595261 = 11905220 / (1 + 1 + 9 + 0 + 5 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 11905192 and 11905201.

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, 297611 + ... + 297650.

It is an arithmetic number, because the mean of its divisors is an integer number (2083417).

Almost surely, 2^11905220 is an apocalyptic number.

11905220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11905220 is an abundant number, since it is smaller than the sum of its proper divisors (13095784).

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

11905220 is a wasteful number, since it uses less digits than its factorization.

11905220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595270 (or 595268 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 11905220 is about 3450.3941803800. The cubic root of 11905220 is about 228.3384989448.

The spelling of 11905220 in words is "eleven million, nine hundred five thousand, two hundred twenty".