229789890 has 72 divisors (see below), whose sum is σ = 656736444. Its totient is φ = 55704000.

The previous prime is 229789873. The next prime is 229789891. The reversal of 229789890 is 98987922.

It can be written as a sum of positive squares in 2 ways, for example, as 219543489 + 10246401 = 14817^2 + 3201^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (229789891) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 340 + ... + 21440.

Almost surely, 2^229789890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 229789890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328368222).

229789890 is an abundant number, since it is smaller than the sum of its proper divisors (426946554).

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

229789890 is a wasteful number, since it uses less digits than its factorization.

229789890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21136 (or 21122 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 229789890 is about 15158.8221837978. The cubic root of 229789890 is about 612.5059413557.

The spelling of 229789890 in words is "two hundred twenty-nine million, seven hundred eighty-nine thousand, eight hundred ninety".