11420856 has 48 divisors (see below), whose sum is σ = 31200000. Its totient is φ = 3773952.

The previous prime is 11420819. The next prime is 11420861. The reversal of 11420856 is 65802411.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 8520 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (650000).

Almost surely, 2^11420856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11420856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15600000).

11420856 is an abundant number, since it is smaller than the sum of its proper divisors (19779144).

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

11420856 is a wasteful number, since it uses less digits than its factorization.

11420856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 11420856 is about 3379.4756989805. The cubic root of 11420856 is about 225.1988760149.

The spelling of 11420856 in words is "eleven million, four hundred twenty thousand, eight hundred fifty-six".