229490897920 has 44 divisors (see below), whose sum is σ = 550509232644. Its totient is φ = 91796357120.

The previous prime is 229490897917. The next prime is 229490897939. The reversal of 229490897920 is 29798094922.

It can be written as a sum of positive squares in 2 ways, for example, as 67616641024 + 161874256896 = 260032^2 + 402336^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22406101 + ... + 22416340.

Almost surely, 2^229490897920 is an apocalyptic number.

229490897920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229490897920 is an abundant number, since it is smaller than the sum of its proper divisors (321018334724).

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

229490897920 is an equidigital number, since it uses as much as digits as its factorization.

229490897920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44822466 (or 44822448 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 229490897920 in words is "two hundred twenty-nine billion, four hundred ninety million, eight hundred ninety-seven thousand, nine hundred twenty".