345290 has 32 divisors (see below), whose sum is σ = 703296. Its totient is φ = 120960.

The previous prime is 345271. The next prime is 345307. The reversal of 345290 is 92543.

345290 is nontrivially palindromic in base 9.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4694 + ... + 4766.

It is an arithmetic number, because the mean of its divisors is an integer number (21978).

2³⁴⁵²⁹⁰ is an apocalyptic number.

345290 is an abundant number, since it is smaller than the sum of its proper divisors (358006).

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

345290 is a wasteful number, since it uses less digits than its factorization.

345290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 345290 is about 587.6138187619. The cubic root of 345290 is about 70.1554369056.

The spelling of 345290 in words is "three hundred forty-five thousand, two hundred ninety".