349428905 has 16 divisors (see below), whose sum is σ = 504439680. Its totient is φ = 226996992.

The previous prime is 349428853. The next prime is 349428907. The reversal of 349428905 is 509824943.

It is a cyclic number.

It is not a de Polignac number, because 349428905 - 2¹⁴ = 349412521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (349428907) 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, 262064 + ... + 263393.

It is an arithmetic number, because the mean of its divisors is an integer number (31527480).

Almost surely, 2^349428905 is an apocalyptic number.

349428905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

349428905 is a deficient number, since it is larger than the sum of its proper divisors (155010775).

349428905 is a wasteful number, since it uses less digits than its factorization.

349428905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525488.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 349428905 is about 18693.0175466670. The cubic root of 349428905 is about 704.3463619610.

The spelling of 349428905 in words is "three hundred forty-nine million, four hundred twenty-eight thousand, nine hundred five".