229185940 has 24 divisors (see below), whose sum is σ = 481771080. Its totient is φ = 91582848.

The previous prime is 229185937. The next prime is 229185977. The reversal of 229185940 is 49581922.

It can be written as a sum of positive squares in 4 ways, for example, as 3104644 + 226081296 = 1762^2 + 15036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 229185893 and 229185902.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17014 + ... + 27346.

It is an arithmetic number, because the mean of its divisors is an integer number (20073795).

Almost surely, 2^229185940 is an apocalyptic number.

229185940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229185940 is an abundant number, since it is smaller than the sum of its proper divisors (252585140).

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

229185940 is a wasteful number, since it uses less digits than its factorization.

229185940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11451 (or 11449 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 229185940 is about 15138.8883343527. Note that the first 3 decimals coincide. The cubic root of 229185940 is about 611.9688601069.

The spelling of 229185940 in words is "two hundred twenty-nine million, one hundred eighty-five thousand, nine hundred forty".