343213440 has 64 divisors (see below), whose sum is σ = 1093998960. Its totient is φ = 91523072.

The previous prime is 343213433. The next prime is 343213469. The reversal of 343213440 is 44312343.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 343213440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87459 + ... + 91298.

Almost surely, 2^343213440 is an apocalyptic number.

343213440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

343213440 is an abundant number, since it is smaller than the sum of its proper divisors (750785520).

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

343213440 is a wasteful number, since it uses less digits than its factorization.

343213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178779 (or 178767 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 343213440 is about 18526.0206196582. The cubic root of 343213440 is about 700.1451671718.

Adding to 343213440 its reverse (44312343), we get a palindrome (387525783).

The spelling of 343213440 in words is "three hundred forty-three million, two hundred thirteen thousand, four hundred forty".