11856840 has 32 divisors (see below), whose sum is σ = 35570880. Its totient is φ = 3161792.

The previous prime is 11856821. The next prime is 11856841. The reversal of 11856840 is 4865811.

It is not an unprimeable number, because it can be changed into a prime (11856841) 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 7 ways as a sum of consecutive naturals, for example, 49284 + ... + 49523.

It is an arithmetic number, because the mean of its divisors is an integer number (1111590).

Almost surely, 2^11856840 is an apocalyptic number.

11856840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11856840 is an abundant number, since it is smaller than the sum of its proper divisors (23714040).

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

11856840 is a wasteful number, since it uses less digits than its factorization.

11856840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98821 (or 98817 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 11856840 is about 3443.3762501359. The cubic root of 11856840 is about 228.0287744540.

The spelling of 11856840 in words is "eleven million, eight hundred fifty-six thousand, eight hundred forty".