343666820 has 96 divisors (see below), whose sum is σ = 871879680. Its totient is φ = 111283200.

The previous prime is 343666819. The next prime is 343666847. The reversal of 343666820 is 28666343.

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, 189920 + ... + 191720.

It is an arithmetic number, because the mean of its divisors is an integer number (9082080).

Almost surely, 2^343666820 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 343666820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435939840).

343666820 is an abundant number, since it is smaller than the sum of its proper divisors (528212860).

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

343666820 is a wasteful number, since it uses less digits than its factorization.

343666820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 343666820 is about 18538.2528842391. The cubic root of 343666820 is about 700.4533254072.

The spelling of 343666820 in words is "three hundred forty-three million, six hundred sixty-six thousand, eight hundred twenty".