229996440 has 192 divisors, whose sum is σ = 793877760. Its totient is φ = 57646080.

The previous prime is 229996421. The next prime is 229996441. The reversal of 229996440 is 44699922.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229996441) 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 47 ways as a sum of consecutive naturals, for example, 412642 + ... + 413198.

It is an arithmetic number, because the mean of its divisors is an integer number (4134780).

Almost surely, 2^229996440 is an apocalyptic number.

229996440 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 229996440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396938880).

229996440 is an abundant number, since it is smaller than the sum of its proper divisors (563881320).

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

229996440 is a wasteful number, since it uses less digits than its factorization.

229996440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 229996440 is about 15165.6335179247. The cubic root of 229996440 is about 612.6894063681.

The spelling of 229996440 in words is "two hundred twenty-nine million, nine hundred ninety-six thousand, four hundred forty".