229840540 has 12 divisors (see below), whose sum is σ = 482665176. Its totient is φ = 91936208.

The previous prime is 229840487. The next prime is 229840543. The reversal of 229840540 is 45048922.

It is a junction number, because it is equal to n+sod(n) for n = 229840496 and 229840505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229840543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5745994 + ... + 5746033.

It is an arithmetic number, because the mean of its divisors is an integer number (40222098).

Almost surely, 2^229840540 is an apocalyptic number.

229840540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229840540 is an abundant number, since it is smaller than the sum of its proper divisors (252824636).

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

229840540 is a wasteful number, since it uses less digits than its factorization.

229840540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11492036 (or 11492034 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 229840540 is about 15160.4927360558. The cubic root of 229840540 is about 612.5509406473.

The spelling of 229840540 in words is "two hundred twenty-nine million, eight hundred forty thousand, five hundred forty".