345558 has 8 divisors (see below), whose sum is σ = 691128. Its totient is φ = 115184.

The previous prime is 345551. The next prime is 345571. The reversal of 345558 is 855543.

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

345558 is an admirable number.

It is a super-3 number, since 3×345558³ = 123789585856443336, which contains 333 as substring.

It is an Ulam number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345551) 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, 28791 + ... + 28802.

It is an arithmetic number, because the mean of its divisors is an integer number (86391).

2³⁴⁵⁵⁵⁸ is an apocalyptic number.

345558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

345558 is a wasteful number, since it uses less digits than its factorization.

345558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57598.

The product of its digits is 12000, while the sum is 30.

The square root of 345558 is about 587.8418154572. The cubic root of 345558 is about 70.1735828069.

It can be divided in two parts, 345 and 558, that multiplied together give a triangular number (192510 = T₆₂₀).

The spelling of 345558 in words is "three hundred forty-five thousand, five hundred fifty-eight".