229138236 has 144 divisors (see below), whose sum is σ = 637378560. Its totient is φ = 69189120.

The previous prime is 229138187. The next prime is 229138277. The reversal of 229138236 is 632831922.

229138236 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 229138236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2027716 + ... + 2027828.

It is an arithmetic number, because the mean of its divisors is an integer number (4426240).

Almost surely, 2^229138236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 229138236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318689280).

229138236 is an abundant number, since it is smaller than the sum of its proper divisors (408240324).

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

229138236 is a wasteful number, since it uses less digits than its factorization.

229138236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 229138236 is about 15137.3127073467. The cubic root of 229138236 is about 611.9263976589.

The spelling of 229138236 in words is "two hundred twenty-nine million, one hundred thirty-eight thousand, two hundred thirty-six".