349128893 has 8 divisors (see below), whose sum is σ = 355611168. Its totient is φ = 342684144.

The previous prime is 349128863. The next prime is 349128931. The reversal of 349128893 is 398821943.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349128893 - 2¹⁶ = 349063357 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 (349128823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9755 + ... + 28167.

It is an arithmetic number, because the mean of its divisors is an integer number (44451396).

Almost surely, 2^349128893 is an apocalyptic number.

It is an amenable number.

349128893 is a deficient number, since it is larger than the sum of its proper divisors (6482275).

349128893 is a wasteful number, since it uses less digits than its factorization.

349128893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18763.

The product of its digits is 373248, while the sum is 47.

The square root of 349128893 is about 18684.9911158662. The cubic root of 349128893 is about 704.1447254596.

The spelling of 349128893 in words is "three hundred forty-nine million, one hundred twenty-eight thousand, eight hundred ninety-three".