11405869 has 8 divisors (see below), whose sum is σ = 11583000. Its totient is φ = 11230272.

The previous prime is 11405857. The next prime is 11405873. The reversal of 11405869 is 96850411.

It can be written as a sum of positive squares in 4 ways, for example, as 96100 + 11309769 = 310^2 + 3363^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11405869 - 2⁵ = 11405837 is a prime.

It is a super-2 number, since 2×11405869² = 260187695290322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29127 + ... + 29515.

It is an arithmetic number, because the mean of its divisors is an integer number (1447875).

Almost surely, 2^11405869 is an apocalyptic number.

It is an amenable number.

11405869 is a deficient number, since it is larger than the sum of its proper divisors (177131).

11405869 is a wasteful number, since it uses less digits than its factorization.

11405869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767.

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

The square root of 11405869 is about 3377.2576152849. The cubic root of 11405869 is about 225.1003272740.

The spelling of 11405869 in words is "eleven million, four hundred five thousand, eight hundred sixty-nine".