349728717 has 16 divisors (see below), whose sum is σ = 508229568. Its totient is φ = 212622720.

The previous prime is 349728697. The next prime is 349728767. The reversal of 349728717 is 717827943.

It is not a de Polignac number, because 349728717 - 2⁶ = 349728653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349728767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50784 + ... + 57257.

It is an arithmetic number, because the mean of its divisors is an integer number (31764348).

Almost surely, 2^349728717 is an apocalyptic number.

It is an amenable number.

349728717 is a deficient number, since it is larger than the sum of its proper divisors (158500851).

349728717 is a wasteful number, since it uses less digits than its factorization.

349728717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108140.

The product of its digits is 592704, while the sum is 48.

The square root of 349728717 is about 18701.0351852511. The cubic root of 349728717 is about 704.5477487779.

The spelling of 349728717 in words is "three hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred seventeen".