11478431 has 4 divisors (see below), whose sum is σ = 11666664. Its totient is φ = 11290200.

The previous prime is 11478421. The next prime is 11478433. The reversal of 11478431 is 13487411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13487411 = 7 ⋅1926773.

It is a cyclic number.

It is not a de Polignac number, because 11478431 - 2⁶ = 11478367 is a prime.

It is a super-2 number, since 2×11478431² = 263508756443522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11478394 and 11478403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11478433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94025 + ... + 94146.

It is an arithmetic number, because the mean of its divisors is an integer number (2916666).

Almost surely, 2^11478431 is an apocalyptic number.

11478431 is a deficient number, since it is larger than the sum of its proper divisors (188233).

11478431 is an equidigital number, since it uses as much as digits as its factorization.

11478431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188232.

The product of its digits is 2688, while the sum is 29.

The square root of 11478431 is about 3387.9833234536. The cubic root of 11478431 is about 225.5766672610.

The spelling of 11478431 in words is "eleven million, four hundred seventy-eight thousand, four hundred thirty-one".