4436644140 has 72 divisors (see below), whose sum is σ = 13463534448. Its totient is φ = 1182602880.

The previous prime is 4436644129. The next prime is 4436644171. The reversal of 4436644140 is 414466344.

4436644140 is a `hidden beast` number, since 4 + 4 + 3 + 6 + 644 + 1 + 4 + 0 = 666.

It is a super-2 number, since 2×4436644140² = 39367622449992679200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4436644095 and 4436644104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 641139 + ... + 648021.

It is an arithmetic number, because the mean of its divisors is an integer number (186993534).

Almost surely, 2^4436644140 is an apocalyptic number.

It is an amenable number.

4436644140 is an abundant number, since it is smaller than the sum of its proper divisors (9026890308).

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

4436644140 is a wasteful number, since it uses less digits than its factorization.

4436644140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10479 (or 10474 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 4436644140 is about 66608.1386919046. The cubic root of 4436644140 is about 1643.1789593772.

The spelling of 4436644140 in words is "four billion, four hundred thirty-six million, six hundred forty-four thousand, one hundred forty".