11409855 has 8 divisors (see below), whose sum is σ = 18255792. Its totient is φ = 6085248.

The previous prime is 11409851. The next prime is 11409877. The reversal of 11409855 is 55890411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11409855 - 2² = 11409851 is a prime.

It is a super-2 number, since 2×11409855² = 260369582242050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 380314 + ... + 380343.

It is an arithmetic number, because the mean of its divisors is an integer number (2281974).

Almost surely, 2^11409855 is an apocalyptic number.

11409855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11409855 is a deficient number, since it is larger than the sum of its proper divisors (6845937).

11409855 is an equidigital number, since it uses as much as digits as its factorization.

11409855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760665.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 11409855 is about 3377.8476875075. The cubic root of 11409855 is about 225.1265460977.

The spelling of 11409855 in words is "eleven million, four hundred nine thousand, eight hundred fifty-five".