349791405 has 16 divisors (see below), whose sum is σ = 592588224. Its totient is φ = 175581440.

The previous prime is 349791391. The next prime is 349791443. The reversal of 349791405 is 504197943.

It is not a de Polignac number, because 349791405 - 2⁵ = 349791373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685611 + ... + 686120.

It is an arithmetic number, because the mean of its divisors is an integer number (37036764).

Almost surely, 2^349791405 is an apocalyptic number.

It is an amenable number.

349791405 is a deficient number, since it is larger than the sum of its proper divisors (242796819).

349791405 is a wasteful number, since it uses less digits than its factorization.

349791405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371756.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 349791405 is about 18702.7111671009. The cubic root of 349791405 is about 704.5898424051.

The spelling of 349791405 in words is "three hundred forty-nine million, seven hundred ninety-one thousand, four hundred five".