349428681 has 32 divisors (see below), whose sum is σ = 593242880. Its totient is φ = 199127808.

The previous prime is 349428631. The next prime is 349428697. The reversal of 349428681 is 186824943.

It is a happy number.

349428681 is a `hidden beast` number, since 3 + 494 + 2 + 86 + 81 = 666.

It is not a de Polignac number, because 349428681 - 2⁹ = 349428169 is a prime.

It is a super-2 number, since 2×349428681² = 244200806210799522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349428631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72705 + ... + 77361.

It is an arithmetic number, because the mean of its divisors is an integer number (18538840).

Almost surely, 2^349428681 is an apocalyptic number.

It is an amenable number.

349428681 is a deficient number, since it is larger than the sum of its proper divisors (243814199).

349428681 is a wasteful number, since it uses less digits than its factorization.

349428681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070 (or 5064 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 349428681 is about 18693.0115551240. The cubic root of 349428681 is about 704.3462114548.

The spelling of 349428681 in words is "three hundred forty-nine million, four hundred twenty-eight thousand, six hundred eighty-one".