1223352240 has 320 divisors, whose sum is σ = 4510425600. Its totient is φ = 271272960.

The previous prime is 1223352233. The next prime is 1223352241. The reversal of 1223352240 is 422533221.

It is a super-2 number, since 2×1223352240² = 2993181406226035200, 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 1223352240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223352241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42184546 + ... + 42184574.

It is an arithmetic number, because the mean of its divisors is an integer number (14095080).

Almost surely, 2^1223352240 is an apocalyptic number.

1223352240 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 1223352240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2255212800).

1223352240 is an abundant number, since it is smaller than the sum of its proper divisors (3287073360).

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

1223352240 is a wasteful number, since it uses less digits than its factorization.

1223352240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1223352240 is about 34976.4526503189. The cubic root of 1223352240 is about 1069.5075149390.

Adding to 1223352240 its reverse (422533221), we get a palindrome (1645885461).

The spelling of 1223352240 in words is "one billion, two hundred twenty-three million, three hundred fifty-two thousand, two hundred forty".