229811428 has 72 divisors (see below), whose sum is σ = 522849600. Its totient is φ = 86412480.

The previous prime is 229811357. The next prime is 229811429. The reversal of 229811428 is 824118922.

It is a happy number.

229811428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (229811429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97083 + ... + 99421.

It is an arithmetic number, because the mean of its divisors is an integer number (7261800).

Almost surely, 2^229811428 is an apocalyptic number.

229811428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 229811428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261424800).

229811428 is an abundant number, since it is smaller than the sum of its proper divisors (293038172).

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

229811428 is a wasteful number, since it uses less digits than its factorization.

229811428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2388 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 229811428 is about 15159.5325785461. The cubic root of 229811428 is about 612.5250773017.

The spelling of 229811428 in words is "two hundred twenty-nine million, eight hundred eleven thousand, four hundred twenty-eight".