349944639 has 16 divisors (see below), whose sum is σ = 510136704. Its totient is φ = 211618400.

The previous prime is 349944629. The next prime is 349944671. The reversal of 349944639 is 936449943.

It is a cyclic number.

It is not a de Polignac number, because 349944639 - 2⁵ = 349944607 is a prime.

It is a super-2 number, since 2×349944639² = 244922500729680642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 349944591 and 349944600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349944619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3712 + ... + 26714.

It is an arithmetic number, because the mean of its divisors is an integer number (31883544).

Almost surely, 2^349944639 is an apocalyptic number.

349944639 is a deficient number, since it is larger than the sum of its proper divisors (160192065).

349944639 is a wasteful number, since it uses less digits than its factorization.

349944639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23478.

The product of its digits is 2519424, while the sum is 51.

The square root of 349944639 is about 18706.8072903957. The cubic root of 349944639 is about 704.6927145325.

The spelling of 349944639 in words is "three hundred forty-nine million, nine hundred forty-four thousand, six hundred thirty-nine".