345778 has 8 divisors (see below), whose sum is σ = 525168. Its totient is φ = 170724.

The previous prime is 345773. The next prime is 345791. The reversal of 345778 is 877543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (345773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (65646).

2³⁴⁵⁷⁷⁸ is an apocalyptic number.

345778 is a deficient number, since it is larger than the sum of its proper divisors (179390).

345778 is a wasteful number, since it uses less digits than its factorization.

345778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168.

The product of its digits is 23520, while the sum is 34.

The square root of 345778 is about 588.0289108539. The cubic root of 345778 is about 70.1884716853.

Subtracting from 345778 its sum of digits (34), we obtain a square (345744 = 588²).

The spelling of 345778 in words is "three hundred forty-five thousand, seven hundred seventy-eight".