347990 has 32 divisors (see below), whose sum is σ = 699840. Its totient is φ = 123904.

The previous prime is 347989. The next prime is 347993. The reversal of 347990 is 99743.

It is a happy number.

347990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347990.

It is not an unprimeable number, because it can be changed into a prime (347993) 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 15 ways as a sum of consecutive naturals, for example, 3866 + ... + 3954.

It is an arithmetic number, because the mean of its divisors is an integer number (21870).

2³⁴⁷⁹⁹⁰ is an apocalyptic number.

347990 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.

347990 is a wasteful number, since it uses less digits than its factorization.

347990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 347990 is about 589.9067722954. The cubic root of 347990 is about 70.3378228131.

The spelling of 347990 in words is "three hundred forty-seven thousand, nine hundred ninety".