635424 has 24 divisors (see below), whose sum is σ = 1668240. Its totient is φ = 211776.

The previous prime is 635423. The next prime is 635431. The reversal of 635424 is 424536.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a d-powerful number, because it can be written as 6³ + 3³ + 4⁷ + 5⁷ + 2¹⁹ + 4⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 635394 and 635403.

It is not an unprimeable number, because it can be changed into a prime (635423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3214 + ... + 3405.

It is an arithmetic number, because the mean of its divisors is an integer number (69510).

2⁶³⁵⁴²⁴ is an apocalyptic number.

It is an amenable number.

635424 is an abundant number, since it is smaller than the sum of its proper divisors (1032816).

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

635424 is a wasteful number, since it uses less digits than its factorization.

635424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632 (or 6624 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 635424 is about 797.1348693916. The cubic root of 635424 is about 85.9715066956.

It can be divided in two parts, 63542 and 4, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 635424 in words is "six hundred thirty-five thousand, four hundred twenty-four".