1223224440 has 192 divisors, whose sum is σ = 3884436000. Its totient is φ = 307915776.

The previous prime is 1223224411. The next prime is 1223224469. The reversal of 1223224440 is 444223221.

It is an interprime number because it is at equal distance from previous prime (1223224411) and next prime (1223224469).

It is a super-2 number, since 2×1223224440² = 2992556061226627200, which contains 22 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 1223224440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8209486 + ... + 8209634.

Almost surely, 2^1223224440 is an apocalyptic number.

1223224440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223224440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1942218000).

1223224440 is an abundant number, since it is smaller than the sum of its proper divisors (2661211560).

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

1223224440 is a wasteful number, since it uses less digits than its factorization.

1223224440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1223224440 is about 34974.6256591833. The cubic root of 1223224440 is about 1069.4702708770.

Adding to 1223224440 its reverse (444223221), we get a palindrome (1667447661).

The spelling of 1223224440 in words is "one billion, two hundred twenty-three million, two hundred twenty-four thousand, four hundred forty".