340990 has 32 divisors (see below), whose sum is σ = 687456. Its totient is φ = 120960.

The previous prime is 340979. The next prime is 340999. The reversal of 340990 is 99043.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340999) by changing a digit.

340990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5560 + ... + 5620.

It is an arithmetic number, because the mean of its divisors is an integer number (21483).

2³⁴⁰⁹⁹⁰ is an apocalyptic number.

340990 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.

340990 is a wasteful number, since it uses less digits than its factorization.

340990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 340990 is about 583.9434904167. The cubic root of 340990 is about 69.8629973421.

The spelling of 340990 in words is "three hundred forty thousand, nine hundred ninety".