Multipling 349440 by its sum of digits (24), we get a triangular number (8386560 = T4095).
It is a nialpdrome in base 4 and base 16.
It is a zygodrome in base 4 and base 16.
It is a self number, because there is not a number n which added to its sum of digits gives 349440.
It is a congruent number.
It is an unprimeable number.
349440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2349440 is an apocalyptic number.
349440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 349440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686784).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
349440 is a wasteful number, since it uses less digits than its factorization.
349440 is an evil number, because the sum of its binary digits is even.
The square root of 349440 is about 591.1345024612. The cubic root of 349440 is about 70.4353816639.
The spelling of 349440 in words is "three hundred forty-nine thousand, four hundred forty".