229890 has 32 divisors (see below), whose sum is σ = 564480. Its totient is φ = 59904.

The previous prime is 229849. The next prime is 229897. The reversal of 229890 is 98922.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (229897) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2322 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2²²⁹⁸⁹⁰ is an apocalyptic number.

229890 is an abundant number, since it is smaller than the sum of its proper divisors (334590).

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

229890 is a wasteful number, since it uses less digits than its factorization.

229890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 229890 is about 479.4684556882. The cubic root of 229890 is about 61.2594876321.

It can be divided in two parts, 2 and 29890, that added together give a palindrome (29892).

The spelling of 229890 in words is "two hundred twenty-nine thousand, eight hundred ninety".