343500640 has 96 divisors (see below), whose sum is σ = 982062144. Its totient is φ = 110837760.

The previous prime is 343500631. The next prime is 343500671. The reversal of 343500640 is 46005343.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10020 + ... + 28060.

It is an arithmetic number, because the mean of its divisors is an integer number (10229814).

Almost surely, 2^343500640 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 343500640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491031072).

343500640 is an abundant number, since it is smaller than the sum of its proper divisors (638561504).

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

343500640 is a wasteful number, since it uses less digits than its factorization.

343500640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18080 (or 18072 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 343500640 is about 18533.7702586387. The cubic root of 343500640 is about 700.3404058644.

Adding to 343500640 its reverse (46005343), we get a palindrome (389505983).

The spelling of 343500640 in words is "three hundred forty-three million, five hundred thousand, six hundred forty".