624020 has 24 divisors (see below), whose sum is σ = 1344168. Its totient is φ = 243200.

The previous prime is 624007. The next prime is 624031. The reversal of 624020 is 20426.

It can be written as a sum of positive squares in 4 ways, for example, as 64516 + 559504 = 254^2 + 748^2 .

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 623986 and 624004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 1200.

It is an arithmetic number, because the mean of its divisors is an integer number (56007).

2⁶²⁴⁰²⁰ 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 624020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672084).

624020 is an abundant number, since it is smaller than the sum of its proper divisors (720148).

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

624020 is a wasteful number, since it uses less digits than its factorization.

624020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 624020 is about 789.9493654659. The cubic root of 624020 is about 85.4540865855.

Adding to 624020 its reverse (20426), we get a palindrome (644446).

The spelling of 624020 in words is "six hundred twenty-four thousand, twenty".