349561216 has 16 divisors (see below), whose sum is σ = 696391740. Its totient is φ = 174780544.

The previous prime is 349561169. The next prime is 349561243. The reversal of 349561216 is 612165943.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365346 + ... + 1365601.

Almost surely, 2^349561216 is an apocalyptic number.

It is an amenable number.

349561216 is a deficient number, since it is larger than the sum of its proper divisors (346830524).

349561216 is an equidigital number, since it uses as much as digits as its factorization.

349561216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730961 (or 2730949 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 349561216 is about 18696.5562604454. The cubic root of 349561216 is about 704.4352508214.

The spelling of 349561216 in words is "three hundred forty-nine million, five hundred sixty-one thousand, two hundred sixteen".