4386639636 has 72 divisors (see below), whose sum is σ = 11532568320. Its totient is φ = 1404651456.

The previous prime is 4386639619. The next prime is 4386639641. The reversal of 4386639636 is 6369366834.

It is a super-2 number, since 2×4386639636² = 38485214592252424992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84385 + ... + 126071.

It is an arithmetic number, because the mean of its divisors is an integer number (160174560).

Almost surely, 2^4386639636 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 4386639636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5766284160).

4386639636 is an abundant number, since it is smaller than the sum of its proper divisors (7145928684).

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

4386639636 is a wasteful number, since it uses less digits than its factorization.

4386639636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41813 (or 41808 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 54.

The square root of 4386639636 is about 66231.7117097241. The cubic root of 4386639636 is about 1636.9823096024.

The spelling of 4386639636 in words is "four billion, three hundred eighty-six million, six hundred thirty-nine thousand, six hundred thirty-six".