8635428 has 18 divisors (see below), whose sum is σ = 21828534. Its totient is φ = 2878464.

The previous prime is 8635423. The next prime is 8635433. The reversal of 8635428 is 8245368.

It is an interprime number because it is at equal distance from previous prime (8635423) and next prime (8635433).

It can be written as a sum of positive squares in only one way, i.e., 8538084 + 97344 = 2922^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 239873 = 8635428 / (8 + 6 + 3 + 5 + 4 + 2 + 8).

It is a d-powerful number, because it can be written as 8⁵ + 6² + 3¹¹ + 5 + 4⁶ + 2²³ + 8⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 8635392 and 8635401.

It is not an unprimeable number, because it can be changed into a prime (8635423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119901 + ... + 119972.

Almost surely, 2^8635428 is an apocalyptic number.

It is an amenable number.

8635428 is an abundant number, since it is smaller than the sum of its proper divisors (13193106).

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

8635428 is a wasteful number, since it uses less digits than its factorization.

8635428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239883 (or 239878 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 8635428 is about 2938.6098754343. The cubic root of 8635428 is about 205.1609127241.

The spelling of 8635428 in words is "eight million, six hundred thirty-five thousand, four hundred twenty-eight".