343620405 has 48 divisors (see below), whose sum is σ = 634883184. Its totient is φ = 171325440.

The previous prime is 343620383. The next prime is 343620413. The reversal of 343620405 is 504026343.

343620405 is a `hidden beast` number, since 34 + 3 + 620 + 4 + 0 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 36 + 343620369 = 6^2 + 18537^2 .

It is not a de Polignac number, because 343620405 - 2⁶ = 343620341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118675 + ... + 121535.

It is an arithmetic number, because the mean of its divisors is an integer number (13226733).

Almost surely, 2^343620405 is an apocalyptic number.

It is an amenable number.

343620405 is a deficient number, since it is larger than the sum of its proper divisors (291262779).

343620405 is a wasteful number, since it uses less digits than its factorization.

343620405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3043 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 343620405 is about 18537.0009710309. Note that the first 3 decimals coincide. The cubic root of 343620405 is about 700.4217900140.

Adding to 343620405 its reverse (504026343), we get a palindrome (847646748).

The spelling of 343620405 in words is "three hundred forty-three million, six hundred twenty thousand, four hundred five".