229729918 has 16 divisors (see below), whose sum is σ = 378233856. Its totient is φ = 103780440.

The previous prime is 229729901. The next prime is 229729921. The reversal of 229729918 is 819927922.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28446 + ... + 35617.

It is an arithmetic number, because the mean of its divisors is an integer number (23639616).

Almost surely, 2^229729918 is an apocalyptic number.

229729918 is a deficient number, since it is larger than the sum of its proper divisors (148503938).

229729918 is a wasteful number, since it uses less digits than its factorization.

229729918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64239.

The product of its digits is 326592, while the sum is 49.

The square root of 229729918 is about 15156.8439326926. The cubic root of 229729918 is about 612.4526515113.

The spelling of 229729918 in words is "two hundred twenty-nine million, seven hundred twenty-nine thousand, nine hundred eighteen".