349867784 has 32 divisors (see below), whose sum is σ = 752310720. Its totient is φ = 149424576.

The previous prime is 349867759. The next prime is 349867813. The reversal of 349867784 is 487768943.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5747 + ... + 27069.

It is an arithmetic number, because the mean of its divisors is an integer number (23509710).

Almost surely, 2^349867784 is an apocalyptic number.

It is an amenable number.

349867784 is an abundant number, since it is smaller than the sum of its proper divisors (402442936).

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

349867784 is a wasteful number, since it uses less digits than its factorization.

349867784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21629 (or 21625 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 56.

The square root of 349867784 is about 18704.7529788554. The cubic root of 349867784 is about 704.6411224444.

The spelling of 349867784 in words is "three hundred forty-nine million, eight hundred sixty-seven thousand, seven hundred eighty-four".