624144 has 20 divisors (see below), whose sum is σ = 1612496. Its totient is φ = 208032.

The previous prime is 624139. The next prime is 624149. The reversal of 624144 is 441426.

It is an interprime number because it is at equal distance from previous prime (624139) and next prime (624149).

It is a super-3 number, since 3×624144³ = 729416619758333952, which contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 624144.

It is not an unprimeable number, because it can be changed into a prime (624149) by changing a digit.

624144 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 3 ways as a sum of consecutive naturals, for example, 6454 + ... + 6549.

2⁶²⁴¹⁴⁴ is an apocalyptic number.

It is an amenable number.

624144 is an abundant number, since it is smaller than the sum of its proper divisors (988352).

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

624144 is a wasteful number, since it uses less digits than its factorization.

624144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13014 (or 13008 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 624144 is about 790.0278476104. The cubic root of 624144 is about 85.4597464494.

The spelling of 624144 in words is "six hundred twenty-four thousand, one hundred forty-four".