11785220 has 24 divisors (see below), whose sum is σ = 25065600. Its totient is φ = 4653792.

The previous prime is 11785217. The next prime is 11785229. The reversal of 11785220 is 2258711.

It is a self number, because there is not a number n which added to its sum of digits gives 11785220.

It is not an unprimeable number, because it can be changed into a prime (11785229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2150 + ... + 5309.

It is an arithmetic number, because the mean of its divisors is an integer number (1044400).

Almost surely, 2^11785220 is an apocalyptic number.

11785220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11785220 is an abundant number, since it is smaller than the sum of its proper divisors (13280380).

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

11785220 is a wasteful number, since it uses less digits than its factorization.

11785220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7547 (or 7545 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 11785220 is about 3432.9608212154. The cubic root of 11785220 is about 227.5687189258.

The spelling of 11785220 in words is "eleven million, seven hundred eighty-five thousand, two hundred twenty".