624426440 has 64 divisors (see below), whose sum is σ = 1547968320. Its totient is φ = 224800000.

The previous prime is 624426331. The next prime is 624426449. The reversal of 624426440 is 44624426.

It is a junction number, because it is equal to n+sod(n) for n = 624426397 and 624426406.

It is not an unprimeable number, because it can be changed into a prime (624426449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37415 + ... + 51465.

It is an arithmetic number, because the mean of its divisors is an integer number (24187005).

Almost surely, 2^624426440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 624426440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (773984160).

624426440 is an abundant number, since it is smaller than the sum of its proper divisors (923541880).

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

624426440 is a wasteful number, since it uses less digits than its factorization.

624426440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14174 (or 14170 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 624426440 is about 24988.5261670231. The cubic root of 624426440 is about 854.7263536118.

The spelling of 624426440 in words is "six hundred twenty-four million, four hundred twenty-six thousand, four hundred forty".