349261857 has 72 divisors (see below), whose sum is σ = 627300960. Its totient is φ = 186157440.

The previous prime is 349261853. The next prime is 349261859. The reversal of 349261857 is 758162943.

It is not a de Polignac number, because 349261857 - 2² = 349261853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349261853) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 611382 + ... + 611952.

Almost surely, 2^349261857 is an apocalyptic number.

It is an amenable number.

349261857 is a deficient number, since it is larger than the sum of its proper divisors (278039103).

349261857 is a wasteful number, since it uses less digits than its factorization.

349261857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 673 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 349261857 is about 18688.5488200663. The cubic root of 349261857 is about 704.2341041179.

The spelling of 349261857 in words is "three hundred forty-nine million, two hundred sixty-one thousand, eight hundred fifty-seven".