11688405 has 16 divisors (see below), whose sum is σ = 18745344. Its totient is φ = 6219200.

The previous prime is 11688379. The next prime is 11688407. The reversal of 11688405 is 50488611.

It is not a de Polignac number, because 11688405 - 2⁵ = 11688373 is a prime.

It is a super-2 number, since 2×11688405² = 273237622888050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11688407) 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 15 ways as a sum of consecutive naturals, for example, 9580 + ... + 10730.

It is an arithmetic number, because the mean of its divisors is an integer number (1171584).

Almost surely, 2^11688405 is an apocalyptic number.

11688405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11688405 is a deficient number, since it is larger than the sum of its proper divisors (7056939).

11688405 is a wasteful number, since it uses less digits than its factorization.

11688405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836.

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

The square root of 11688405 is about 3418.8309405409. The cubic root of 11688405 is about 226.9438494379.

The spelling of 11688405 in words is "eleven million, six hundred eighty-eight thousand, four hundred five".