229539840 has 128 divisors (see below), whose sum is σ = 736089120. Its totient is φ = 61079552.

The previous prime is 229539833. The next prime is 229539847. The reversal of 229539840 is 48935922.

It is an interprime number because it is at equal distance from previous prime (229539833) and next prime (229539847).

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 229539792 and 229539801.

It is not an unprimeable number, because it can be changed into a prime (229539847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491287 + ... + 491753.

Almost surely, 2^229539840 is an apocalyptic number.

229539840 is a gapful number since it is divisible by the number (20) 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 229539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368044560).

229539840 is an abundant number, since it is smaller than the sum of its proper divisors (506549280).

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

229539840 is an frugal number, since it uses more digits than its factorization.

229539840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 229539840 is about 15150.5722664195. The cubic root of 229539840 is about 612.2836909370.

The spelling of 229539840 in words is "two hundred twenty-nine million, five hundred thirty-nine thousand, eight hundred forty".