1234443440 has 80 divisors (see below), whose sum is σ = 3055304448. Its totient is φ = 462225408.

The previous prime is 1234443401. The next prime is 1234443449. The reversal of 1234443440 is 443444321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1234443449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260129 + ... + 264831.

Almost surely, 2^1234443440 is an apocalyptic number.

1234443440 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 1234443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527652224).

1234443440 is an abundant number, since it is smaller than the sum of its proper divisors (1820861008).

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

1234443440 is a wasteful number, since it uses less digits than its factorization.

1234443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926 (or 4920 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 1234443440 is about 35134.6472872576. The cubic root of 1234443440 is about 1072.7299318834.

Adding to 1234443440 its reverse (443444321), we get a palindrome (1677887761).

The spelling of 1234443440 in words is "one billion, two hundred thirty-four million, four hundred forty-three thousand, four hundred forty".