344221540 has 48 divisors (see below), whose sum is σ = 780442992. Its totient is φ = 126775296.

The previous prime is 344221531. The next prime is 344221547. The reversal of 344221540 is 45122443.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 26811684 + 317409856 = 5178^2 + 17816^2 .

It is not an unprimeable number, because it can be changed into a prime (344221547) 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, 117372 + ... + 120268.

It is an arithmetic number, because the mean of its divisors is an integer number (16259229).

Almost surely, 2^344221540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 344221540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390221496).

344221540 is an abundant number, since it is smaller than the sum of its proper divisors (436221452).

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

344221540 is a wasteful number, since it uses less digits than its factorization.

344221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376 (or 3374 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 344221540 is about 18553.2083478842. The cubic root of 344221540 is about 700.8299950717.

Adding to 344221540 its reverse (45122443), we get a palindrome (389343983).

The spelling of 344221540 in words is "three hundred forty-four million, two hundred twenty-one thousand, five hundred forty".