298905 has 8 divisors (see below), whose sum is σ = 478272. Its totient is φ = 159408.

The previous prime is 298897. The next prime is 298937. The reversal of 298905 is 509892.

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

It is not a de Polignac number, because 298905 - 2³ = 298897 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9949 + ... + 9978.

It is an arithmetic number, because the mean of its divisors is an integer number (59784).

2²⁹⁸⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

298905 is a deficient number, since it is larger than the sum of its proper divisors (179367).

298905 is a wasteful number, since it uses less digits than its factorization.

298905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19935.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 298905 is about 546.7220500401. The cubic root of 298905 is about 66.8617480365.

The spelling of 298905 in words is "two hundred ninety-eight thousand, nine hundred five".