11578431 has 4 divisors (see below), whose sum is σ = 15437912. Its totient is φ = 7718952.

The previous prime is 11578423. The next prime is 11578439. The reversal of 11578431 is 13487511.

11578431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11578423) and next prime (11578439).

It is not a de Polignac number, because 11578431 - 2³ = 11578423 is a prime.

It is a super-2 number, since 2×11578431² = 268120128843522, 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 (11578439) 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 3 ways as a sum of consecutive naturals, for example, 1929736 + ... + 1929741.

It is an arithmetic number, because the mean of its divisors is an integer number (3859478).

Almost surely, 2^11578431 is an apocalyptic number.

11578431 is a deficient number, since it is larger than the sum of its proper divisors (3859481).

11578431 is an equidigital number, since it uses as much as digits as its factorization.

11578431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859480.

The product of its digits is 3360, while the sum is 30.

The square root of 11578431 is about 3402.7093616705. The cubic root of 11578431 is about 226.2298481283.

The spelling of 11578431 in words is "eleven million, five hundred seventy-eight thousand, four hundred thirty-one".