343255640 has 128 divisors (see below), whose sum is σ = 957640320. Its totient is φ = 107827200.

The previous prime is 343255631. The next prime is 343255651. The reversal of 343255640 is 46552343.

It is a junction number, because it is equal to n+sod(n) for n = 343255597 and 343255606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658580 + ... + 659100.

It is an arithmetic number, because the mean of its divisors is an integer number (7481565).

Almost surely, 2^343255640 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 343255640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478820160).

343255640 is an abundant number, since it is smaller than the sum of its proper divisors (614384680).

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

343255640 is a wasteful number, since it uses less digits than its factorization.

343255640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 343255640 is about 18527.1595232513. The cubic root of 343255640 is about 700.1738615757.

The spelling of 343255640 in words is "three hundred forty-three million, two hundred fifty-five thousand, six hundred forty".