345490 has 8 divisors (see below), whose sum is σ = 621900. Its totient is φ = 138192.

The previous prime is 345487. The next prime is 345511. The reversal of 345490 is 94543.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 17161 = 573^2 + 131^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17265 + ... + 17284.

2³⁴⁵⁴⁹⁰ is an apocalyptic number.

345490 is a deficient number, since it is larger than the sum of its proper divisors (276410).

345490 is a wasteful number, since it uses less digits than its factorization.

345490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34556.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 345490 is about 587.7839739224. The cubic root of 345490 is about 70.1689795115.

The spelling of 345490 in words is "three hundred forty-five thousand, four hundred ninety".