229928491 has 4 divisors (see below), whose sum is σ = 247615312. Its totient is φ = 212241672.

The previous prime is 229928477. The next prime is 229928593. The reversal of 229928491 is 194829922.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 229928491 - 2¹¹ = 229926443 is a prime.

It is a super-2 number, since 2×229928491² = 105734221947074162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229928191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8843391 + ... + 8843416.

It is an arithmetic number, because the mean of its divisors is an integer number (61903828).

Almost surely, 2^229928491 is an apocalyptic number.

229928491 is a deficient number, since it is larger than the sum of its proper divisors (17686821).

229928491 is a wasteful number, since it uses less digits than its factorization.

229928491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17686820.

The product of its digits is 186624, while the sum is 46.

The square root of 229928491 is about 15163.3931229128. The cubic root of 229928491 is about 612.6290637921.

The spelling of 229928491 in words is "two hundred twenty-nine million, nine hundred twenty-eight thousand, four hundred ninety-one".