11431404 has 18 divisors (see below), whose sum is σ = 28896140. Its totient is φ = 3810456.

The previous prime is 11431403. The next prime is 11431447. The reversal of 11431404 is 40413411.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×11431404² = 261353994822432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11431403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158734 + ... + 158805.

Almost surely, 2^11431404 is an apocalyptic number.

It is an amenable number.

11431404 is an abundant number, since it is smaller than the sum of its proper divisors (17464736).

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

11431404 is a wasteful number, since it uses less digits than its factorization.

11431404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317549 (or 317544 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 11431404 is about 3381.0359359226. The cubic root of 11431404 is about 225.2681839206.

Adding to 11431404 its reverse (40413411), we get a palindrome (51844815).

The spelling of 11431404 in words is "eleven million, four hundred thirty-one thousand, four hundred four".