229236642 has 40 divisors (see below), whose sum is σ = 516988956. Its totient is φ = 75917088.

The previous prime is 229236563. The next prime is 229236643. The reversal of 229236642 is 246632922.

229236642 is a `hidden beast` number, since 2 + 2 + 9 + 2 + 3 + 6 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 225630441 + 3606201 = 15021^2 + 1899^2 .

It is a junction number, because it is equal to n+sod(n) for n = 229236597 and 229236606.

It is not an unprimeable number, because it can be changed into a prime (229236643) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 20928 + ... + 29940.

Almost surely, 2^229236642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 229236642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258494478).

229236642 is an abundant number, since it is smaller than the sum of its proper divisors (287752314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

229236642 is a wasteful number, since it uses less digits than its factorization.

229236642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184 (or 9175 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 229236642 is about 15140.5628032778. The cubic root of 229236642 is about 612.0139846862.

The spelling of 229236642 in words is "two hundred twenty-nine million, two hundred thirty-six thousand, six hundred forty-two".