4989636 has 72 divisors (see below), whose sum is σ = 13837824. Its totient is φ = 1509120.

The previous prime is 4989613. The next prime is 4989637. The reversal of 4989636 is 6369894.

4989636 is a `hidden beast` number, since 4 + 9 + 8 + 9 + 636 = 666.

4989636 is nontrivially palindromic in base 16.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 4989591 and 4989600.

It is not an unprimeable number, because it can be changed into a prime (4989637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18841 + ... + 19103.

It is an arithmetic number, because the mean of its divisors is an integer number (192192).

Almost surely, 2^4989636 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 4989636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6918912).

4989636 is an abundant number, since it is smaller than the sum of its proper divisors (8848188).

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

4989636 is a wasteful number, since it uses less digits than its factorization.

4989636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 316 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 4989636 is about 2233.7493144935. The cubic root of 4989636 is about 170.8793650031.

It can be divided in two parts, 4989 and 636, that added together give a square (5625 = 75²).

The spelling of 4989636 in words is "four million, nine hundred eighty-nine thousand, six hundred thirty-six".