349428 has 24 divisors (see below), whose sum is σ = 838432. Its totient is φ = 113184.

The previous prime is 349423. The next prime is 349471. The reversal of 349428 is 824943.

It is a happy number.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁹ + 4⁸ + 4⁹ + 9 + 2¹¹ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 349395 and 349404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349423) by changing a digit.

349428 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 7 ways as a sum of consecutive naturals, for example, 51 + ... + 837.

2³⁴⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

349428 is an abundant number, since it is smaller than the sum of its proper divisors (489004).

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

349428 is a wasteful number, since it uses less digits than its factorization.

349428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 349428 is about 591.1243523997. The cubic root of 349428 is about 70.4345753889.

It can be divided in two parts, 349 and 428, that added together give a palindrome (777).

The spelling of 349428 in words is "three hundred forty-nine thousand, four hundred twenty-eight".