349636240 has 20 divisors (see below), whose sum is σ = 812904444. Its totient is φ = 139854464.

The previous prime is 349636213. The next prime is 349636253. The reversal of 349636240 is 42636943.

It can be written as a sum of positive squares in 2 ways, for example, as 262699264 + 86936976 = 16208^2 + 9324^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 349636240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185147 + ... + 2185306.

Almost surely, 2^349636240 is an apocalyptic number.

It is an amenable number.

349636240 is an abundant number, since it is smaller than the sum of its proper divisors (463268204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

349636240 is a wasteful number, since it uses less digits than its factorization.

349636240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370466 (or 4370460 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 349636240 is about 18698.5625115943. The cubic root of 349636240 is about 704.4856433015.

The spelling of 349636240 in words is "three hundred forty-nine million, six hundred thirty-six thousand, two hundred forty".