11431830 has 16 divisors (see below), whose sum is σ = 27436464. Its totient is φ = 3048480.

The previous prime is 11431817. The next prime is 11431831. The reversal of 11431830 is 3813411.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11431797 and 11431806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190501 + ... + 190560.

It is an arithmetic number, because the mean of its divisors is an integer number (1714779).

Almost surely, 2^11431830 is an apocalyptic number.

11431830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11431830 is an abundant number, since it is smaller than the sum of its proper divisors (16004634).

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

11431830 is a wasteful number, since it uses less digits than its factorization.

11431830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381071.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 11431830 is about 3381.0989337788. The cubic root of 11431830 is about 225.2709821495.

The spelling of 11431830 in words is "eleven million, four hundred thirty-one thousand, eight hundred thirty".