635428 has 12 divisors (see below), whose sum is σ = 1129072. Its totient is φ = 312840.

The previous prime is 635423. The next prime is 635431. The reversal of 635428 is 824536.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 6³ + 3³ + 4 + 5⁷ + 2¹⁹ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 635396 and 635405.

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

635428 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, 918 + ... + 1453.

2⁶³⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

635428 is a deficient number, since it is larger than the sum of its proper divisors (493644).

635428 is a wasteful number, since it uses less digits than its factorization.

635428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 2440 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 635428 is about 797.1373783734. The cubic root of 635428 is about 85.9716870923.

The spelling of 635428 in words is "six hundred thirty-five thousand, four hundred twenty-eight".