229638745 has 24 divisors (see below), whose sum is σ = 328389768. Its totient is φ = 153619200.

The previous prime is 229638743. The next prime is 229638749. The reversal of 229638745 is 547836922.

It can be written as a sum of positive squares in 4 ways, for example, as 20894041 + 208744704 = 4571^2 + 14448^2 .

It is not a de Polignac number, because 229638745 - 2¹ = 229638743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 229638695 and 229638704.

It is not an unprimeable number, because it can be changed into a prime (229638743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1386 + ... + 21475.

It is an arithmetic number, because the mean of its divisors is an integer number (13682907).

Almost surely, 2^229638745 is an apocalyptic number.

It is an amenable number.

229638745 is a deficient number, since it is larger than the sum of its proper divisors (98751023).

229638745 is a wasteful number, since it uses less digits than its factorization.

229638745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22921 (or 22914 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 229638745 is about 15153.8359830110. The cubic root of 229638745 is about 612.3716193517.

It can be divided in two parts, 2296 and 38745, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 229638745 in words is "two hundred twenty-nine million, six hundred thirty-eight thousand, seven hundred forty-five".