345278 has 8 divisors (see below), whose sum is σ = 534720. Its totient is φ = 167040.

The previous prime is 345271. The next prime is 345307. The reversal of 345278 is 872543.

It is a happy number.

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 345278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345271) 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, 2723 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (66840).

2³⁴⁵²⁷⁸ is an apocalyptic number.

345278 is a deficient number, since it is larger than the sum of its proper divisors (189442).

345278 is a wasteful number, since it uses less digits than its factorization.

345278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5602.

The product of its digits is 6720, while the sum is 29.

The square root of 345278 is about 587.6036078855. The cubic root of 345278 is about 70.1546241829.

The spelling of 345278 in words is "three hundred forty-five thousand, two hundred seventy-eight".