4428636 has 36 divisors (see below), whose sum is σ = 10985688. Its totient is φ = 1388288.

The previous prime is 4428607. The next prime is 4428643. The reversal of 4428636 is 6368244.

It is a super-2 number, since 2×4428636² = 39225633640992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4428597 and 4428606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2830 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (305158).

Almost surely, 2^4428636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4428636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5492844).

4428636 is an abundant number, since it is smaller than the sum of its proper divisors (6557052).

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

4428636 is a wasteful number, since it uses less digits than its factorization.

4428636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1299 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 4428636 is about 2104.4324650604. The cubic root of 4428636 is about 164.2189718268.

It can be divided in two parts, 44 and 28636, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 4428636 in words is "four million, four hundred twenty-eight thousand, six hundred thirty-six".