624820 has 24 divisors (see below), whose sum is σ = 1499904. Its totient is φ = 214176.

The previous prime is 624809. The next prime is 624829. The reversal of 624820 is 28426.

It is a junction number, because it is equal to n+sod(n) for n = 624791 and 624800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624829) by changing a digit.

624820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2092 + ... + 2371.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2⁶²⁴⁸²⁰ is an apocalyptic number.

It is an amenable number.

624820 is an abundant number, since it is smaller than the sum of its proper divisors (875084).

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

624820 is a wasteful number, since it uses less digits than its factorization.

624820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 624820 is about 790.4555648485. The cubic root of 624820 is about 85.4905886612.

It can be divided in two parts, 624 and 820, that added together give a square (1444 = 38²).

The spelling of 624820 in words is "six hundred twenty-four thousand, eight hundred twenty".