342890 has 16 divisors (see below), whose sum is σ = 653832. Its totient is φ = 129024.

The previous prime is 342889. The next prime is 342899. The reversal of 342890 is 98243.

It can be written as a sum of positive squares in 4 ways, for example, as 337561 + 5329 = 581^2 + 73^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (342899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839 + ... + 1178.

2³⁴²⁸⁹⁰ is an apocalyptic number.

342890 is a deficient number, since it is larger than the sum of its proper divisors (310942).

342890 is a wasteful number, since it uses less digits than its factorization.

342890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 342890 is about 585.5681002240. The cubic root of 342890 is about 69.9925162067.

The spelling of 342890 in words is "three hundred forty-two thousand, eight hundred ninety".