234021440 has 56 divisors (see below), whose sum is σ = 570887352. Its totient is φ = 91320320.

The previous prime is 234021433. The next prime is 234021443. The reversal of 234021440 is 44120432.

234021440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12845056 + 221176384 = 3584^2 + 14872^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (234021443) 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, 4202 + ... + 22038.

It is an arithmetic number, because the mean of its divisors is an integer number (10194417).

Almost surely, 2^234021440 is an apocalyptic number.

234021440 is a gapful number since it is divisible by the number (20) 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 234021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285443676).

234021440 is an abundant number, since it is smaller than the sum of its proper divisors (336865912).

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

234021440 is a wasteful number, since it uses less digits than its factorization.

234021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17895 (or 17885 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 234021440 is about 15297.7593130497. The cubic root of 234021440 is about 616.2428344891.

Adding to 234021440 its reverse (44120432), we get a palindrome (278141872).

It can be divided in two parts, 23402 and 1440, that added together give a palindrome (24842).

The spelling of 234021440 in words is "two hundred thirty-four million, twenty-one thousand, four hundred forty".