11400431 has 4 divisors (see below), whose sum is σ = 13029072. Its totient is φ = 9771792.

The previous prime is 11400427. The next prime is 11400439. The reversal of 11400431 is 13400411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13400411 = 1223 ⋅10957.

It is a cyclic number.

It is not a de Polignac number, because 11400431 - 2² = 11400427 is a prime.

It is a super-2 number, since 2×11400431² = 259939653971522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11400439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814310 + ... + 814323.

It is an arithmetic number, because the mean of its divisors is an integer number (3257268).

Almost surely, 2^11400431 is an apocalyptic number.

11400431 is a deficient number, since it is larger than the sum of its proper divisors (1628641).

11400431 is an equidigital number, since it uses as much as digits as its factorization.

11400431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628640.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11400431 is about 3376.4524282152. The cubic root of 11400431 is about 225.0645477360.

Adding to 11400431 its reverse (13400411), we get a palindrome (24800842).

The spelling of 11400431 in words is "eleven million, four hundred thousand, four hundred thirty-one".