11851620 has 48 divisors (see below), whose sum is σ = 36203328. Its totient is φ = 2872960.

The previous prime is 11851613. The next prime is 11851621. The reversal of 11851620 is 2615811.

It is not an unprimeable number, because it can be changed into a prime (11851621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8319 + ... + 9638.

It is an arithmetic number, because the mean of its divisors is an integer number (754236).

Almost surely, 2^11851620 is an apocalyptic number.

11851620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11851620 is an abundant number, since it is smaller than the sum of its proper divisors (24351708).

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

11851620 is a wasteful number, since it uses less digits than its factorization.

11851620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17980 (or 17978 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11851620 is about 3442.6181896923. The cubic root of 11851620 is about 227.9953061514.

The spelling of 11851620 in words is "eleven million, eight hundred fifty-one thousand, six hundred twenty".