229918780 has 72 divisors (see below), whose sum is σ = 604896768. Its totient is φ = 72761472.

The previous prime is 229918769. The next prime is 229918789. The reversal of 229918780 is 87819922.

It is a self number, because there is not a number n which added to its sum of digits gives 229918780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229918789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3717 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (8401344).

Almost surely, 2^229918780 is an apocalyptic number.

229918780 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 229918780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302448384).

229918780 is an abundant number, since it is smaller than the sum of its proper divisors (374977988).

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

229918780 is a wasteful number, since it uses less digits than its factorization.

229918780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18083 (or 18074 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 229918780 is about 15163.0729075607. The cubic root of 229918780 is about 612.6204389010.

The spelling of 229918780 in words is "two hundred twenty-nine million, nine hundred eighteen thousand, seven hundred eighty".