11685820 has 24 divisors (see below), whose sum is σ = 25140528. Its totient is φ = 4560000.

The previous prime is 11685803. The next prime is 11685823. The reversal of 11685820 is 2858611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11685823) 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, 6306 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (1047522).

Almost surely, 2^11685820 is an apocalyptic number.

11685820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11685820 is an abundant number, since it is smaller than the sum of its proper divisors (13454708).

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

11685820 is a wasteful number, since it uses less digits than its factorization.

11685820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14301 (or 14299 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 11685820 is about 3418.4528664295. The cubic root of 11685820 is about 226.9271179534.

The spelling of 11685820 in words is "eleven million, six hundred eighty-five thousand, eight hundred twenty".