345684 has 12 divisors (see below), whose sum is σ = 806624. Its totient is φ = 115224.

The previous prime is 345679. The next prime is 345689. The reversal of 345684 is 486543.

345684 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (345679) and next prime (345689).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345689) by changing a digit.

345684 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14392 + ... + 14415.

2³⁴⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

345684 is an abundant number, since it is smaller than the sum of its proper divisors (460940).

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

345684 is a wasteful number, since it uses less digits than its factorization.

345684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28814 (or 28812 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 345684 is about 587.9489773781. The cubic root of 345684 is about 70.1821108466.

The spelling of 345684 in words is "three hundred forty-five thousand, six hundred eighty-four".