624423040 has 32 divisors (see below), whose sum is σ = 1492762860. Its totient is φ = 249768960.

The previous prime is 624423017. The next prime is 624423043. The reversal of 624423040 is 40324426.

It can be written as a sum of positive squares in 2 ways, for example, as 624200256 + 222784 = 24984^2 + 472^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 624422996 and 624423014.

It is not an unprimeable number, because it can be changed into a prime (624423043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 487191 + ... + 488470.

Almost surely, 2^624423040 is an apocalyptic number.

It is an amenable number.

624423040 is an abundant number, since it is smaller than the sum of its proper divisors (868339820).

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

624423040 is an equidigital number, since it uses as much as digits as its factorization.

624423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975680 (or 975668 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 624423040 is about 24988.4581357074. The cubic root of 624423040 is about 854.7248022816.

Adding to 624423040 its reverse (40324426), we get a palindrome (664747466).

The spelling of 624423040 in words is "six hundred twenty-four million, four hundred twenty-three thousand, forty".