624432 has 20 divisors (see below), whose sum is σ = 1613240. Its totient is φ = 208128.

The previous prime is 624419. The next prime is 624443. The reversal of 624432 is 234426.

624432 = T₃₆₈ + T₃₆₉ + ... + T₃₇₆.

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 junction number, because it is equal to n+sod(n) for n = 624399 and 624408.

It is an unprimeable number.

624432 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, 6457 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (80662).

2⁶²⁴⁴³² is an apocalyptic number.

It is an amenable number.

624432 is an abundant number, since it is smaller than the sum of its proper divisors (988808).

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

624432 is a wasteful number, since it uses less digits than its factorization.

624432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13020 (or 13014 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 624432 is about 790.2100986447. The cubic root of 624432 is about 85.4728890481.

Adding to 624432 its reverse (234426), we get a palindrome (858858).

The spelling of 624432 in words is "six hundred twenty-four thousand, four hundred thirty-two".