344923639 has 8 divisors (see below), whose sum is σ = 356700672. Its totient is φ = 333187320.

The previous prime is 344923627. The next prime is 344923661. The reversal of 344923639 is 936329443.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344923639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 344923595 and 344923604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344933639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7572 + ... + 27334.

It is an arithmetic number, because the mean of its divisors is an integer number (44587584).

Almost surely, 2^344923639 is an apocalyptic number.

344923639 is a deficient number, since it is larger than the sum of its proper divisors (11777033).

344923639 is a wasteful number, since it uses less digits than its factorization.

344923639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20357.

The product of its digits is 419904, while the sum is 43.

The square root of 344923639 is about 18572.1199382300. The cubic root of 344923639 is about 701.3061592262.

Adding to 344923639 its product of digits (419904), we get a palindrome (345343543).

The spelling of 344923639 in words is "three hundred forty-four million, nine hundred twenty-three thousand, six hundred thirty-nine".