624442 has 32 divisors (see below), whose sum is σ = 1193472. Its totient is φ = 238464.

The previous prime is 624419. The next prime is 624443. The reversal of 624442 is 244426.

624442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×624442² = 779855622728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (624443) 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, 8518 + ... + 8590.

It is an arithmetic number, because the mean of its divisors is an integer number (37296).

2⁶²⁴⁴⁴² is an apocalyptic number.

624442 is a deficient number, since it is larger than the sum of its proper divisors (569030).

624442 is a wasteful number, since it uses less digits than its factorization.

624442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142.

The product of its digits is 1536, while the sum is 22.

The square root of 624442 is about 790.2164260505. The cubic root of 624442 is about 85.4733453157.

Adding to 624442 its reverse (244426), we get a palindrome (868868).

The spelling of 624442 in words is "six hundred twenty-four thousand, four hundred forty-two".