229640 has 16 divisors (see below), whose sum is σ = 516780. Its totient is φ = 91840.

The previous prime is 229639. The next prime is 229681. The reversal of 229640 is 46922.

It can be written as a sum of positive squares in 2 ways, for example, as 228484 + 1156 = 478^2 + 34^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2831 + ... + 2910.

2²²⁹⁶⁴⁰ is an apocalyptic number.

229640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229640 is an abundant number, since it is smaller than the sum of its proper divisors (287140).

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

229640 is a wasteful number, since it uses less digits than its factorization.

229640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752 (or 5748 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 229640 is about 479.2076794042. The cubic root of 229640 is about 61.2372734908.

The spelling of 229640 in words is "two hundred twenty-nine thousand, six hundred forty".