349640 has 16 divisors (see below), whose sum is σ = 786780. Its totient is φ = 139840.

The previous prime is 349637. The next prime is 349663. The reversal of 349640 is 46943.

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 20164 = 574^2 + 142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4331 + ... + 4410.

2³⁴⁹⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

349640 is an abundant number, since it is smaller than the sum of its proper divisors (437140).

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

349640 is a wasteful number, since it uses less digits than its factorization.

349640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752 (or 8748 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 349640 is about 591.3036445009. The cubic root of 349640 is about 70.4488168647.

It can be divided in two parts, 349 and 640, that added together give a palindrome (989).

The spelling of 349640 in words is "three hundred forty-nine thousand, six hundred forty".