1234222440 has 128 divisors (see below), whose sum is σ = 4276955520. Its totient is φ = 281600000.

The previous prime is 1234222411. The next prime is 1234222441. The reversal of 1234222440 is 442224321.

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 1234222440.

It is not an unprimeable number, because it can be changed into a prime (1234222441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5061 + ... + 49940.

It is an arithmetic number, because the mean of its divisors is an integer number (33413715).

Almost surely, 2^1234222440 is an apocalyptic number.

1234222440 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 1234222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138477760).

1234222440 is an abundant number, since it is smaller than the sum of its proper divisors (3042733080).

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

1234222440 is a wasteful number, since it uses less digits than its factorization.

1234222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55043 (or 55039 counting only the distinct ones).

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

The square root of 1234222440 is about 35131.5021028137. The cubic root of 1234222440 is about 1072.6659118140.

Adding to 1234222440 its reverse (442224321), we get a palindrome (1676446761).

The spelling of 1234222440 in words is "one billion, two hundred thirty-four million, two hundred twenty-two thousand, four hundred forty".