11423220 has 24 divisors (see below), whose sum is σ = 31985184. Its totient is φ = 3046176.

The previous prime is 11423189. The next prime is 11423227. The reversal of 11423220 is 2232411.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11423220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11423227) 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, 95134 + ... + 95253.

It is an arithmetic number, because the mean of its divisors is an integer number (1332716).

Almost surely, 2^11423220 is an apocalyptic number.

11423220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11423220 is an abundant number, since it is smaller than the sum of its proper divisors (20561964).

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

11423220 is a wasteful number, since it uses less digits than its factorization.

11423220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190399 (or 190397 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 11423220 is about 3379.8254392794. The cubic root of 11423220 is about 225.2144128951.

Adding to 11423220 its reverse (2232411), we get a palindrome (13655631).

The spelling of 11423220 in words is "eleven million, four hundred twenty-three thousand, two hundred twenty".