345404 has 6 divisors (see below), whose sum is σ = 604464. Its totient is φ = 172700.

The previous prime is 345379. The next prime is 345413. The reversal of 345404 is 404543.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345404.

It is an unprimeable number.

345404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43172 + ... + 43179.

It is an arithmetic number, because the mean of its divisors is an integer number (100744).

2³⁴⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

345404 is a deficient number, since it is larger than the sum of its proper divisors (259060).

345404 is a wasteful number, since it uses less digits than its factorization.

345404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86355 (or 86353 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 345404 is about 587.7108132407. The cubic root of 345404 is about 70.1631568316.

Adding to 345404 its reverse (404543), we get a palindrome (749947).

The spelling of 345404 in words is "three hundred forty-five thousand, four hundred four".