342820 has 24 divisors (see below), whose sum is σ = 734328. Its totient is φ = 134400.

The previous prime is 342803. The next prime is 342821. The reversal of 342820 is 28243.

It is a happy number.

342820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 338724 = 64^2 + 582^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (30597).

2³⁴²⁸²⁰ is an apocalyptic number.

It is an amenable number.

342820 is an abundant number, since it is smaller than the sum of its proper divisors (391508).

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

342820 is a wasteful number, since it uses less digits than its factorization.

342820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 342820 is about 585.5083261577. The cubic root of 342820 is about 69.9877529595.

The spelling of 342820 in words is "three hundred forty-two thousand, eight hundred twenty".