349630905 has 16 divisors (see below), whose sum is σ = 602441280. Its totient is φ = 172125888.

The previous prime is 349630901. The next prime is 349630937. The reversal of 349630905 is 509036943.

It is not a de Polignac number, because 349630905 - 2² = 349630901 is a prime.

It is a super-2 number, since 2×349630905² = 244483539462238050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (349630901) 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, 896295 + ... + 896684.

It is an arithmetic number, because the mean of its divisors is an integer number (37652580).

Almost surely, 2^349630905 is an apocalyptic number.

It is an amenable number.

349630905 is a deficient number, since it is larger than the sum of its proper divisors (252810375).

349630905 is a wasteful number, since it uses less digits than its factorization.

349630905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793000.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 349630905 is about 18698.4198530250. The cubic root of 349630905 is about 704.4820601012.

The spelling of 349630905 in words is "three hundred forty-nine million, six hundred thirty thousand, nine hundred five".