349690 has 36 divisors (see below), whose sum is σ = 734958. Its totient is φ = 119680.

The previous prime is 349667. The next prime is 349697. The reversal of 349690 is 96943.

It can be written as a sum of positive squares in 3 ways, for example, as 339889 + 9801 = 583^2 + 99^2 .

It is a super-2 number, since 2×349690² = 244566192200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (349697) by changing a digit.

349690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20562 + ... + 20578.

2³⁴⁹⁶⁹⁰ is an apocalyptic number.

349690 is an abundant number, since it is smaller than the sum of its proper divisors (385268).

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

349690 is a wasteful number, since it uses less digits than its factorization.

349690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 349690 is about 591.3459224515. The cubic root of 349690 is about 70.4521748643.

The spelling of 349690 in words is "three hundred forty-nine thousand, six hundred ninety".