343247640 has 64 divisors (see below), whose sum is σ = 1031304960. Its totient is φ = 91393920.

The previous prime is 343247581. The next prime is 343247659. The reversal of 343247640 is 46742343.

It is a super-3 number, since 3×343247640³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95557 + ... + 99083.

It is an arithmetic number, because the mean of its divisors is an integer number (16114140).

Almost surely, 2^343247640 is an apocalyptic number.

343247640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

343247640 is an abundant number, since it is smaller than the sum of its proper divisors (688057320).

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

343247640 is a wasteful number, since it uses less digits than its factorization.

343247640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352 (or 4348 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 33.

The square root of 343247640 is about 18526.9436227350. The cubic root of 343247640 is about 700.1684220589.

Adding to 343247640 its reverse (46742343), we get a palindrome (389989983).

The spelling of 343247640 in words is "three hundred forty-three million, two hundred forty-seven thousand, six hundred forty".