223126440 has 32 divisors (see below), whose sum is σ = 669379680. Its totient is φ = 59500352.

The previous prime is 223126439. The next prime is 223126447. The reversal of 223126440 is 44621322.

It is a super-3 number, since 3×223126440³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 223126440.

It is not an unprimeable number, because it can be changed into a prime (223126447) 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 7 ways as a sum of consecutive naturals, for example, 929574 + ... + 929813.

It is an arithmetic number, because the mean of its divisors is an integer number (20918115).

Almost surely, 2^223126440 is an apocalyptic number.

223126440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223126440 is an abundant number, since it is smaller than the sum of its proper divisors (446253240).

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

223126440 is a wasteful number, since it uses less digits than its factorization.

223126440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859401 (or 1859397 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 223126440 is about 14937.4174474706. The cubic root of 223126440 is about 606.5272888899.

Adding to 223126440 its reverse (44621322), we get a palindrome (267747762).

The spelling of 223126440 in words is "two hundred twenty-three million, one hundred twenty-six thousand, four hundred forty".