349780 has 12 divisors (see below), whose sum is σ = 734580. Its totient is φ = 139904.

The previous prime is 349759. The next prime is 349787. The reversal of 349780 is 87943.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 311364 = 196^2 + 558^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8725 + ... + 8764.

It is an arithmetic number, because the mean of its divisors is an integer number (61215).

2³⁴⁹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

349780 is an abundant number, since it is smaller than the sum of its proper divisors (384800).

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

349780 is a wasteful number, since it uses less digits than its factorization.

349780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17498 (or 17496 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 349780 is about 591.4220151465. The cubic root of 349780 is about 70.4582184570.

It can be divided in two parts, 34 and 9780, that multiplied together give a triangular number (332520 = T₈₁₅).

The spelling of 349780 in words is "three hundred forty-nine thousand, seven hundred eighty".