349489257 has 32 divisors (see below), whose sum is σ = 519966720. Its totient is φ = 207351360.

The previous prime is 349489253. The next prime is 349489271. The reversal of 349489257 is 752984943.

It is not a de Polignac number, because 349489257 - 2² = 349489253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349489253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564294 + ... + 564912.

It is an arithmetic number, because the mean of its divisors is an integer number (16248960).

Almost surely, 2^349489257 is an apocalyptic number.

It is an amenable number.

349489257 is a deficient number, since it is larger than the sum of its proper divisors (170477463).

349489257 is a wasteful number, since it uses less digits than its factorization.

349489257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133.

The product of its digits is 2177280, while the sum is 51.

The square root of 349489257 is about 18694.6317695749. The cubic root of 349489257 is about 704.3869102804.

The spelling of 349489257 in words is "three hundred forty-nine million, four hundred eighty-nine thousand, two hundred fifty-seven".