349878784 has 20 divisors (see below), whose sum is σ = 699075234. Its totient is φ = 174939136.

The previous prime is 349878779. The next prime is 349878797. The reversal of 349878784 is 487878943.

It can be written as a sum of positive squares in only one way, i.e., 319408384 + 30470400 = 17872^2 + 5520^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341167 + ... + 342190.

Almost surely, 2^349878784 is an apocalyptic number.

It is an amenable number.

349878784 is a deficient number, since it is larger than the sum of its proper divisors (349196450).

349878784 is an frugal number, since it uses more digits than its factorization.

349878784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683375 (or 683359 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The square root of 349878784 is about 18705.0470194544. The cubic root of 349878784 is about 704.6485071113.

The spelling of 349878784 in words is "three hundred forty-nine million, eight hundred seventy-eight thousand, seven hundred eighty-four".