11409856 has 28 divisors (see below), whose sum is σ = 23975568. Its totient is φ = 5368832.

The previous prime is 11409851. The next prime is 11409877. The reversal of 11409856 is 65890411.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4156 + ... + 6331.

Almost surely, 2^11409856 is an apocalyptic number.

11409856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11409856 is an abundant number, since it is smaller than the sum of its proper divisors (12565712).

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

11409856 is a wasteful number, since it uses less digits than its factorization.

11409856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516 (or 10506 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 11409856 is about 3377.8478355308. The cubic root of 11409856 is about 225.1265526746.

The spelling of 11409856 in words is "eleven million, four hundred nine thousand, eight hundred fifty-six".