423140240 has 40 divisors (see below), whose sum is σ = 988831800. Its totient is φ = 168390656.

The previous prime is 423140239. The next prime is 423140293. The reversal of 423140240 is 42041324.

It can be written as a sum of positive squares in 4 ways, for example, as 106584976 + 316555264 = 10324^2 + 17792^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2336 + ... + 29184.

It is an arithmetic number, because the mean of its divisors is an integer number (24720795).

Almost surely, 2^423140240 is an apocalyptic number.

423140240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423140240 is an abundant number, since it is smaller than the sum of its proper divisors (565691560).

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

423140240 is a wasteful number, since it uses less digits than its factorization.

423140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27059 (or 27053 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 423140240 is about 20570.3728697367. The cubic root of 423140240 is about 750.7490235544.

Adding to 423140240 its reverse (42041324), we get a palindrome (465181564).

The spelling of 423140240 in words is "four hundred twenty-three million, one hundred forty thousand, two hundred forty".