349828821 has 16 divisors (see below), whose sum is σ = 532273600. Its totient is φ = 226915344.

The previous prime is 349828811. The next prime is 349828823. The reversal of 349828821 is 128828943.

349828821 is a `hidden beast` number, since 349 + 8 + 288 + 21 = 666.

It is not a de Polignac number, because 349828821 - 2⁵ = 349828789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349828823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174091 + ... + 176088.

It is an arithmetic number, because the mean of its divisors is an integer number (33267100).

Almost surely, 2^349828821 is an apocalyptic number.

It is an amenable number.

349828821 is a deficient number, since it is larger than the sum of its proper divisors (182444779).

349828821 is a wasteful number, since it uses less digits than its factorization.

349828821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350225 (or 350219 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 349828821 is about 18703.7114231374. The cubic root of 349828821 is about 704.6149640378.

The spelling of 349828821 in words is "three hundred forty-nine million, eight hundred twenty-eight thousand, eight hundred twenty-one".